私たちは海の９０％を知らない～深海のナゾに迫る！～ 2025年3月29日 いま、海に異変が起きている！
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TVTranscript
00:00Kureto
00:30Ten years ago, in the deep sea of Suruga Bay, more than 2,000 meters above sea level,
00:34a new type of large-scale deep sea fish, Yokozuna Sardine, was discovered.
00:40In addition, they set up a trap at a depth of 300 meters.
00:48Is it a shrimp?
00:49No, it's a cod.
00:50Oh, it's a cod!
00:53It's a cod!
00:55This is the most popular one.
00:56Thank you!
00:58The most popular fish, Yokozuna Sardine,
01:01is the most popular fish in the Numazukou Deep Sea Aquarium.
01:05And in the deep sea of the world, a new type of large-scale deep sea fish was discovered.
01:11It was found at a depth of 1,200 meters above sea level.
01:16I don't know what this is.
01:18What is this?
01:19Is this your first time?
01:20Yes, it is.
01:21I don't know what this is.
01:22I don't know what this is.
01:23I don't know what this is.
01:25Currently, there are 240,000 species of sea creatures,
01:29but they are just a part of them.
01:34In addition, there are treasures in the deep sea.
01:39The treasure is located at a depth of 5,500 meters
01:42near the southernmost island of Japan.
01:49What is this?
01:52Here it is.
01:54Seriously?
01:56There are so many of them.
01:59It contains essential ingredients for electronic devices.
02:02It's a jewel of mineral resources, manganese.
02:05Its volume is 2.3 billion tons.
02:08I want to know more about the sea that is being explored in various ways in recent years.
02:15So, the theme of this episode is the change of the sea.
02:18Next episode
02:21As we get closer to the sea in Kagoshima prefecture,
02:24we see a terrible situation.
02:29It's amazing.
02:30It's amazing.
02:34I thought it was a huge amount of sea creatures.
02:39It's about 70 to 80 percent of sea creatures.
02:42I see.
02:44These sea creatures have been increasing recently.
02:49On the other hand, what kind of fish is being caught in Kagoshima prefecture in recent years?
02:53In addition,
02:57last year's Noto Earthquake,
02:59the surface of the sea was over 5 meters above sea level.
03:04There was a ship here.
03:05There was a ship here?
03:06It was floating here.
03:07It was floating here.
03:08I see.
03:10There was a white-ish light.
03:12Yes.
03:13That was the bottom of the sea.
03:15All of them were people of the sea.
03:17I see.
03:18I was surprised.
03:19I was surprised.
03:20I was surprised.
03:22What is going on in the sea of Noto Earthquake?
03:29There is a secret in the very popular Kakurekumanomi.
03:33There is a secret in the very popular Kakurekumanomi.
03:39It's clear that there are sea creatures.
03:44We don't know 90 percent of the sea.
03:48Something strange is happening in the sea.
03:53It's started.
03:54We don't know 90 percent of the sea.
03:57We are going to dig into the sea that we don't know yet.
04:05We have Mr. Unno from the Japan Foundation who is familiar with the sea.
04:10Nice to meet you.
04:11Nice to meet you.
04:12Mr. Unno, are you concerned about the sea?
04:15Yes.
04:16There are many strange things happening in the sea that we can't see.
04:20Especially, there are many cases that affect marine life.
04:25So, it affects our dining table.
04:30I think it's best to talk to a fisherman who is on the forefront of the sea
04:35about what kind of changes and abnormalities there are.
04:43Fish that the Japanese have been eating for a long time surrounded by the sea.
04:50There are 2,774 fishing ports around the country.
04:54Various kinds of seafood have been caught in various cities.
04:58But, there is a change in the fishing industry.
05:05So, we will ask the fishermen in four locations around the country for the latest information.
05:12Fishermen from various regions.
05:14That's right.
05:15We have invited four people.
05:18First of all, Mr. Abe from Samenoura Fishing Port in Ishinomaki.
05:22Nice to meet you.
05:24Nice to meet you.
05:26Do you feel the change in the sea?
05:29Yes, I do.
05:31Especially, I think the change has been dramatic in the last 10 years.
05:39Is it dramatic?
05:41Ishinomaki is one of the three largest fishing ports in the world, surrounded by exquisite fishing grounds.
05:47One of the 44 fishing ports, Samenoura Fishing Port,
05:51Mr. Abe, who has been in the industry for a long time, felt the change of the sea at the forefront.
05:58What part has changed dramatically?
06:01In the winter, I used to catch a lot of red sea bream.
06:07But, I can't catch red sea bream at all.
06:12What?
06:15Can't you catch red sea bream?
06:20Red sea bream, which is loved by Nabe and Shirako.
06:23The amount of fish caught in Ishinomaki has decreased by one-fourth in 10 years.
06:30Something strange is going on.
06:32That's right.
06:33I can't catch what I can.
06:35Mr. Abe.
06:37Compared to 10 years ago in Minamisanriku,
06:41I heard that you can catch a lot of red sea bream.
06:47That's right.
06:49The number of red sea bream has increased considerably.
06:51Last year, I caught about 500 tons of red sea bream.
07:04Only red sea bream?
07:07The number of red sea bream has decreased and the number of red sea bream has increased.
07:12Originally, red sea bream was caught in western Japan, such as Ehime and Nagasaki.
07:19However, in recent years, the number of red sea bream has decreased.
07:25On the other hand, Miyagi Prefecture has greatly increased.
07:28The number of red sea bream has increased by 500 times in 10 years.
07:33The number of red sea bream has decreased and the number of red sea bream has increased.
07:39What is going on?
07:42The sea water temperature has risen.
07:46According to the data of the Meteorological Agency, the sea water temperature has risen by about 1.33 degrees in 100 years.
07:53The sea water temperature has risen.
07:56When the sea water temperature rises by 1 degree, the temperature on the ground changes by 10 degrees.
08:04If you look at the fish, it only rises by 1 degree, but it feels like it's rising by 10 degrees.
08:10The fish that used to live in a certain area are gone.
08:15The fish that have never been there will come in.
08:19We call this phenomenon a change in the sea water temperature.
08:26Change in the sea water temperature.
08:31The water temperature rises due to warming.
08:34As a result, the fish also rise and change in the place where they live.
08:40Then, the phenomenon of changing the type of fish that can be caught during travel occurs in various parts of Japan.
08:48Next is Mr. Kobayashi from Enashi Fishing Port in Shizuoka Prefecture.
08:52Mr. Kobayashi.
08:54Hello.
08:55Hello. Nice to meet you.
08:58Surugawan, which boasts the best water quality in Japan.
09:03Enashi Fishing Port in Numazu, which boasts the second highest fishing volume in the prefecture.
09:08Mr. Kobayashi is in charge of fishing boats in the morning.
09:12In the afternoon, he goes out to various fishing spots depending on the season.
09:15How is it? Do you feel any change in Shizuoka Prefecture?
09:22In recent years, Shizuoka has changed a lot.
09:25I live in Izu Peninsula in the Tohoku region.
09:29In Izu Peninsula, the amount of fish was quite high.
09:36However, in recent years, the amount of fish has decreased significantly.
09:41Does that mean that Shizuoka is moving up to the north again?
09:46Shizuoka is decreasing in fish.
09:50Do you hear that Shizuoka is moving to another place?
09:54Yes.
09:55People from Chiba Prefecture catch fish every year.
09:58People from Mie Prefecture talk to me and tell me that Shizuoka is decreasing in fish.
10:04I see.
10:06As its name suggests, it is called Ise Ebi because many people from Ise, Mie Prefecture come to Shizuoka.
10:15Shizuoka is famous for its sea food, but in recent years, the amount of fish has decreased significantly.
10:21What is the reason?
10:24Is there anything that you can catch instead of not being able to catch?
10:28In recent years, the number of red flags has increased.
10:35I see.
10:37I have the image that it is warm.
10:41The ecological system is going crazy.
10:44In recent years, the number of people who used to be there has decreased.
10:50As the number of red flags increases, shrimp, crabs, and crustaceans become their favorite food.
10:59Babies are also eaten.
11:02I see.
11:04As the sea temperature rises, the number of red flags in the north has become a factor in reducing Ise Ebi.
11:12In addition,
11:14coral reefs have erupted in Shizuoka.
11:21Coral reefs have erupted?
11:23Coral reefs have erupted?
11:27In recent years, 30-degree sea level has risen in Shizuoka.
11:32I see.
11:50The water temperature suitable for coral reefs is 25 to 28 degrees.
11:55As the day goes over 30 degrees, the plant plankton living in the coral reefs escape and the coral reefs turn white.
12:04The phenomenon of the skeleton peeling off seen in Okinawa has been confirmed in Numazu, Shizuoka in recent years.
12:12Yes, the problem of the southern sea is also rising in the north.
12:16As the coral reefs have red flags, when the water temperature rises, the coral reefs turn white.
12:28I'm sorry that I'm moving in a cold way even though it's hot.
12:32It's complicated.
12:34Red flags are living in the coral reefs.
12:37This plant plankton escapes due to the influx of seawater temperature and the coral reefs turn white.
12:43When the water temperature drops, it may return to its original state.
12:48It's quite a strange phenomenon.
12:50Thank you very much.
12:52Mr. Ryo Tabura often comes here.
12:54He is my partner in fishing.
12:56He comes here to catch fish.
12:58He rides on my boat.
13:00Please entrust the fish to Ryo.
13:04Next is a strange phenomenon in Hokkaido.
13:07Thank you very much.
13:09This is Ootsukukai, which is known for the drift ice in winter.
13:13This is a popular tourist spot.
13:15This is the representative aquatic city of Hokkaido.
13:18This is a problem that can't be overlooked even in Monbetsu.
13:22This is the coldest sea in Japan.
13:25Is there any abnormality in Hokkaido?
13:29The drift ice is still floating in the harbor.
13:34At this time of year, the water temperature drops to about 2 to 3 degrees.
13:40However, the way the water temperature drops is slow at the entrance of the autumn before the drift ice comes.
13:47It doesn't go down completely.
13:49Actually, it's about November of the autumn.
13:54It's a time when the drift ice comes to Ootsuku.
14:01Last year, I didn't put the drift ice in the market.
14:07Is that so?
14:10There is an abnormality in Hokkaido and Tohoku that you can't catch squid in the cold sea.
14:18In addition.
14:20Recently, there have been many cases of squid coming to Ootsuku.
14:27There are also many cases of squid in the low-land net.
14:31There are also many cases of squid.
14:33Is there a possibility that the real tuna of Ouma will disappear?
14:41On the contrary, it may become a tuna that has a brand.
14:46It will become Monbetsu tuna.
14:47It will become Monbetsu tuna.
14:49In Hokkaido, the northernmost part of Japan, there is also a change in fishing in the warm season.
14:58Finally, what is going on in Kagoshima, the southernmost part of Kyushu?
15:04Compared to five years ago due to the recent change in seawater temperature.
15:12Basically, squid are caught in this season.
15:15It has decreased by about 80%.
15:1880%?
15:20The number of squid has decreased by 80%.
15:23Kagoshima, Ibusuki City
15:27The person who went to investigate the incident was Ibusuki, Kagoshima.
15:34He went to Chogamizu fishing port at midnight in late February.
15:38He got on the ship of Mr. Kawabata.
15:42What kind of fish are you fishing today?
15:45I'm fishing in the low-land net.
15:47What kind of fish is it?
15:49I'm fishing in the low-land net.
15:54Can I go with you?
15:56Let's go.
15:59Mr. Kawabata has been fishing for three generations.
16:03He has been fishing in the low-land net for more than 20 years.
16:09The low-land net is a device to catch fish with a net installed in advance.
16:14If you get lost and arrive at the last net, you will not be able to get out.
16:22It takes three minutes from departure.
16:27Is it around here?
16:33The point is near the coast.
16:35Mr. Kawabata is fishing in the low-land net.
16:42He pulls up the fish-hooked net to the side of the ship.
16:49Then...
16:59There are a lot of fish.
17:05I'm going to catch fish with this net.
17:13He puts a big net on the crane.
17:18It's the beginning of fishing.
17:23He is using his hands.
17:33It's amazing.
17:35I've never seen this before.
17:38It's amazing.
17:43The fish is frozen at once.
17:46It's a big size.
17:51It's amazing.
17:52It's a lot of fish.
17:54It's a big size.
17:56He caught one ton of fish.
17:59It's a lot of fish.
18:02It's a lot of fish.
18:04This is a horse mackerel.
18:05Is this a horse mackerel?
18:07The season when you can catch horse mackerel is from November to May.
18:13This season is very short.
18:17It's about February to March.
18:21It's about two months.
18:22That's a long time.
18:23It's been six months.
18:26It's about 70 to 80 percent.
18:29It's about the same in the low-land area.
18:32Until five years ago, it was the season of horse mackerel for half a year.
18:37It was decreasing in just two months.
18:42The situation is getting worse.
18:45Let's take a look at the fish he caught.
18:48This is a horse mackerel.
18:52This is a horse mackerel.
18:55This is a mackerel.
18:58This is a horse mackerel.
19:01This is called horse mackerel.
19:04This is called horse mackerel.
19:06We've been catching a lot of them lately.
19:09I don't know if the water temperature is rising now.
19:12It's getting easier to catch them.
19:14The horse mackerel is caught in winter.
19:19It's in season now.
19:21This is an autumn mackerel.
19:23This is also a fire extinguisher.
19:26You can use it before the water temperature drops or when the water temperature rises.
19:31I've been able to catch seasonal fish so far, but I don't know when and what I can catch.
19:45The fish that can be caught at a different time suddenly increase.
19:49Therefore, there is an unexpected effect.
19:53I was able to catch one fish today.
19:56It's 1,000 yen per kilogram.
19:59Mackerel is 50 yen per kilogram.
20:02Goldfish is 100 yen per kilogram.
20:04This is a world of tens of yen.
20:08Because of this, the operating cost has decreased and the amount of water has also decreased.
20:15If you can't read it, your life won't be stable.
20:20The reality is that the income is unstable.
20:24A vicious cycle of fishing changes is taking place.
20:29When the fishing is over, the fish caught will be shipped to the largest market in Kagoshima.
20:38It's a place where fish from the prefecture gather.
20:45This is a rockfish.
20:47Rockfish?
20:52And there is also an effect of fishing changes in the market.
20:56That's amazing.
20:58This is a horse mackerel from Nagasaki.
21:04Is that so?
21:06For some reason, there is a horse mackerel from Nagasaki in the Kagoshima market.
21:11When the amount of horse mackerel has decreased,
21:16we will sell horse mackerel in Kagoshima.
21:25The amount of horse mackerel is the largest in Japan.
21:28From Nagasaki to Kagoshima.
21:30The cost of long-distance travel also increases.
21:34In addition.
21:35What is that?
21:37This is a horse mackerel from Kagoshima.
21:41Is it a horse mackerel from Kagoshima?
21:45That's amazing.
21:47Horse mackerel.
21:48It looks like a horse mackerel leaf.
21:51This is a fish called Akitaro.
21:54It is a fish that can be caught in autumn.
21:57I don't know why, but it can be caught in midwinter.
22:01The famous horse mackerel from Kagoshima.
22:04For some reason, the taste of autumn makes me want to eat horse mackerel in midwinter.
22:08It is a specialty in Kagoshima.
22:10We have only caught one horse mackerel.
22:12If there were many horse mackerels this time of year, it would be dangerous.
22:17I see.
22:18It seems that the number of horse mackerels has changed a lot.
22:23This is not the only change.
22:27This kind of horse mackerel has increased recently.
22:31Has it increased?
22:32The number of horse mackerels has increased.
22:36Here is a quiz.
22:38What fish has increased in the sea of Kagoshima in recent years?
22:45The sea of Kagoshima?
22:46I wonder what it is.
22:48It means that the number of horse mackerels has increased from the south.
22:53I think it's a parrotfish.
22:54A parrotfish?
22:55It's a vivid color in Okinawa.
22:58Isn't it small?
23:01Isn't it a tropical fish?
23:03Is it a tropical fish?
23:07What kind of fish has increased in the sea of Kagoshima in recent years?
23:11The correct answer is...
23:14It is called GURUKUN in Okinawa prefecture.
23:17I can catch GURUKUN.
23:20I see.
23:22This is very difficult.
23:24That's right.
23:26This is GURUKUN in Okinawa prefecture.
23:31By the way, on this day in Kagoshima...
23:35This is a tropical fish.
23:38This is a tropical fish called HIBUDAI.
23:40It looks like a fish from Okinawa.
23:44I wish I could catch this in the summer.
23:47It's strange that I can catch it now.
23:52HIBUDAI can be caught in the warm sea of Okinawa.
23:56The number of tropical fish is increasing.
23:59In the summer, GURUKUN and HIBUDAI are caught.
24:05The number of GURUKUN and HIBUDAI is about 200.
24:10The number of fish that could not be caught in Kagoshima is increasing.
24:16GURUKUN, a swordfish in Okinawa, stands out.
24:20Fried fish and sashimi are the standard.
24:24In Kagoshima, GURUKUN is sent to Okinawa because the consumption is low.
24:31Even if you catch GURUKUN there, you have to pay for it.
24:39That's right.
24:41If there is no fish culture in the place where GURUKUN was caught, it will not sell.
24:47That's why GURUKUN has to be sent to a place where there is fish culture.
24:53Recently, GURUKUN was caught in FUKUSHIMA.
24:57However, there is no GURUKUN culture in FUKUSHIMA.
25:00That's why GURUKUN is sent to Shimosei.
25:05GURUKUN is sent to Shimosei by a chef.
25:09GURUKUN is brought from Shimosei.
25:11GURUKUN is cooked in Shimosei.
25:13That's why GURUKUN is sent to Shimosei.
25:15That's why GURUKUN is sent to Shimosei.
25:17That's why GURUKUN is sent to Shimosei.
25:19In addition, there is a problem.
25:23Seaweed and sea urchin are gone.
25:29Seaweed is gone?
25:32Recently, there are more fish that eat seaweed.
25:36It's a fish called ISUZUMI.
25:40ISUZUMI eats seaweed.
25:43ISUZUMI was originally a fish around here.
25:47Fish that eat seaweed lose their appetite when the water temperature drops below 16 degrees.
25:55In winter, the water temperature often drops below 16 degrees.
26:01Fish eat seaweed all year round.
26:07Seaweed is gone in the coastal area around here.
26:12There is a video that captures the abnormality.
26:20That's right.
26:23Fish eat seaweed by digging a net to protect the net.
26:29The role of seaweed is to protect the fish and other marine life.
26:36The role of seaweed is to protect the fish and other marine life.
26:41The fish eat seaweed and there is no place to protect the fish, which means that there will be fewer resources for aquaculture.
26:49What is UNDO doing now?
26:54What do you mean by that?
26:55Actually, we want to monitor the sea with the fishermen who came out earlier.
27:03We want to know the sea that we don't know.
27:07We want to get the water temperature data for each aquaculture.
27:13Fishermen from 13 countries all over the country set up a device that can measure the water temperature and salinity.
27:20The data will be sent to Tokyo University and the system will be launched in April this year.
27:32The research on the sea is in a hurry to stop the abnormalities that occur on our tables.
27:39What kind of abnormalities will we see?
27:44There are many abnormalities.
27:46Not only the environment in the sea, but also the rise in the sea water temperature.
27:51It is said that it promotes the change of the fish itself.
27:59Silver-threaded sardines that live in groups spread widely in southern Japan.
28:06A surprising fact was revealed in a survey 9 years ago.
28:11What is the reason for the silver-threaded sardines?
28:18Silver-threaded sardines live in a group.
28:21They don't live in a group.
28:25I see.
28:27The sea water temperature rises.
28:32The lower the area, the lower the water temperature.
28:38The lower the area, the lower the water temperature.
28:40It changes the living area.
28:44I'm choosing this because I don't want to go there.
28:51For example.
28:54We visited an expert from Tokyo University who is familiar with the ecology of fish.
29:02I'm studying the ecology of fish.
29:05I'm studying how males and females love each other.
29:10Professor Okubo is studying the love of fish.
29:15It is hard to believe that fish have different sexes.
29:21Let's go to the aquarium to find out.
29:26Today, I would like to introduce that knowing this will make the aquarium more fun.
29:33Let's learn about the surprising ecology of fish.
29:40The first fish I would like to introduce is a famous fish.
29:46It's a hidden bear fish.
29:48Hidden bear fish often live in silver-threaded sardines.
29:53Silver-threaded sardines are poisonous.
29:56Other fish can't get close to them.
29:59But silver-threaded sardines have a special membrane.
30:02Silver-threaded sardines can live in silver-threaded sardines.
30:10Hidden bear fish live in Okinawa.
30:13The surprising thing is their gender.
30:18There are three hidden bear fish here.
30:20Can you tell which one is a male and which one is a female?
30:23Can you tell which one is a male and which one is a female?
30:26The biggest one is a female.
30:29The second one is a male.
30:32This is the absolute rule.
30:36Hidden bear fish change their gender.
30:42Change their gender?
30:46They live in groups.
30:49The biggest one is a female.
30:52The second one is a male.
30:55The third one and the fourth one don't have a gender.
30:59The second one and the fourth one become a couple.
31:01This is the absolute rule of the world of hidden bear fish.
31:05Does the biggest one die?
31:08If the biggest one dies, the second male will hatch and become a female.
31:14It hatches?
31:16If the biggest one dies, the second male will become a female.
31:22The third one will become a male.
31:25Interesting.
31:26Why do they change their gender?
31:28The purpose is clear.
31:30It's to leave more offspring.
31:33If a bear fish becomes a couple with one male and one female,
31:38the biggest one becomes a female and the smallest one becomes a male.
31:42This is the most efficient way.
31:44The bigger the female, the more eggs she can lay.
31:47Does a female change her body?
31:50We can't tell by her appearance.
31:52But her body changes dramatically.
31:54The one with a sperm will have an ovary.
31:59So her body changes dramatically.
32:02I see.
32:04Only fish change their gender.
32:09Out of 35,000 species of fish in the world,
32:125% of them change their gender.
32:16That's a lot.
32:175%?
32:18There are two types of change of gender.
32:22One is to leave more offspring.
32:27So they change their gender strategically.
32:31The other one is a recent problem.
32:35They change their gender unintentionally.
32:41These are the two types of change of gender.
32:45There are two types of change of gender.
32:49One is to leave more offspring.
32:52The other is to change their gender because of the environment.
32:55In the case of the silverback,
32:58the ratio of male and female should be 1 to 1 in the wild.
33:05According to a survey conducted 9 years ago,
33:0780% of the silverback in Tokyo Bay
33:10are male.
33:15That's a lot.
33:16Due to the stress of the rising sea temperature,
33:19the female changes her body to a male.
33:26By the way, the familiar eel
33:31also changes its gender for a reason.
33:34What is the reason?
33:36When the eel is small,
33:38if you keep it in a high density,
33:41even the female should be a male.
33:46Eels are kept in a high density.
33:50According to the survey,
33:52most of the eels are male.
33:55That's right.
33:56The eel's gender is determined by 2 to 3 months after birth.
34:00The density of life affects the eel.
34:04In the case of breeding, the eel is almost always a male.
34:08Most of the eels you eat
34:10are breeding eels.
34:12I think the eel is almost always a male.
34:14That's right.
34:18By the way, the eel is said to be delicious
34:21because the female is bigger, thicker, and softer.
34:26We shouldn't ignore the fact that
34:29the environment we don't know
34:31is having an unexpected effect.
34:36I don't know.
34:39Is there any other fish we know
34:42that changes its gender?
34:44Yes, there is.
34:46We will introduce some other fish
34:48that changes its gender.
34:52A familiar fish is flounder.
34:55Flounder?
34:56Flounder also changes its gender.
34:59When it is stressed,
35:01it becomes a male.
35:03It becomes a male?
35:04Yes.
35:05In the case of flounder in Japan,
35:08when the water temperature is about 18 degrees,
35:12it becomes a male.
35:15The water temperature rises little by little.
35:19When the water temperature is about 27 degrees,
35:22it becomes a male.
35:26There are so many things that we don't know
35:29about super-major fish like flounder.
35:32There are so many things we don't know about flounder in the sea.
35:35Next is this fish that has a surprising change of gender.
35:40This is another species.
35:42This has nothing to do with the rise in water temperature.
35:46Flounder lives in Okinawa Bay.
35:50As its name suggests,
35:52it lives from Okinawa to Izumurai.
35:58It changes its gender many times in a lifetime.
36:01How many times?
36:02Male? Female?
36:06Flounder can't go far.
36:09It can't move.
36:11So it doesn't waste its chance to meet.
36:14I see.
36:15In a sense, it's a good idea.
36:18Flounder is able to approach
36:20as soon as it meets.
36:22Flounder is able to approach as soon as it meets.
36:25What's interesting is that
36:27several flounders came from Okinawa.
36:30For example,
36:32a handsome male and a cute female came.
36:35So flounders in Okinawa
36:37don't know which gender they should approach.
36:41They don't know which gender they should approach.
36:45Some flounders are cute.
36:47Some flounders are handsome.
36:49So flounders in Okinawa
36:51don't know which gender they should approach.
36:54That's interesting.
36:55I want to see that moment.
37:00Japan has the 6th longest coastline in the world.
37:05About 200 years ago,
37:07a flounder fished in Toho.
37:10While the fishing was successful,
37:12there was a place that couldn't be measured.
37:15That place was
37:19in the sea.
37:23Three years ago,
37:25the Sea Map Project
37:27has been working on the problem.
37:30It's a plan to create a sea map of shallow waters
37:33from the coastline of Japan
37:35that couldn't be measured yesterday.
37:39A laser beam from an airplane
37:41measures the depth of water up to 20 meters.
37:46By collecting this data,
37:48the location of rocks in the sea can be found
37:51and a mysterious sea map can be created.
37:57A sea map.
37:58It's amazing.
38:00It can be useful for many things.
38:02It's amazing.
38:04The coastline of Japan
38:06is rich in biodiversity.
38:09If you know the sea level,
38:11you can find the basic data
38:13about the number of species
38:15that you didn't know before.
38:18It's very useful.
38:20Also,
38:21from the perspective of disaster prevention
38:24and disaster reduction,
38:26the impact of the shallow water
38:28is tsunami.
38:30With this data,
38:32you can do a simulation.
38:35Then,
38:36you can know how much waves will come.
38:39It's a correction of evacuation plan.
38:41I see.
38:42You can make use of it.
38:44It's very valuable.
38:48In three years,
38:5025% of the total distance of the coastline of Japan
38:53has been measured.
38:56They aim to complete it in seven years.
39:00In the meantime,
39:01they measured the coastline of Japan three years ago.
39:04This year, they measure it again
39:06and compare it.
39:09The orange part is the land area.
39:12This part
39:14has increased significantly.
39:17The reason for the huge change is
39:22the earthquake of the coastline of Japan
39:24that recorded the maximum seismic intensity of 7
39:26last year.
39:30They compare the sea map of the coastline of Japan three years ago
39:33with this year's map.
39:38The orange part is the land area.
39:42This part
39:44has increased significantly.
39:47The reason for the huge change is
39:51the earthquake of the coastline of Japan
39:53that recorded the maximum seismic intensity of 7
39:55last year.
39:59The sea level rose by more than five meters.
40:03In other words, the ground level rose.
40:08What is going on at the site?
40:11A fishing park in Noto Peninsula.
40:16Hello.
40:17Hello.
40:18Are you Ryu?
40:19Yes, I am.
40:21How is it going?
40:23There was a boat here.
40:24There was a boat here?
40:25I was on it.
40:26I see.
40:27I see.
40:29That white line
40:31was all the seabed.
40:34It was all under the sea.
40:36I see.
40:37Were you surprised?
40:38I was surprised.
40:39You were surprised.
40:40It means that the earthquake itself has increased.
40:44That's right.
40:45But I don't feel anything like that.
40:48That's how it is.
40:51Noto Peninsula, Wajima City,
40:54has a lot of fishing boats,
40:56so the sea level is high.
40:59However,
41:01after the earthquake,
41:02the sea level rose by more than four meters.
41:05As a result,
41:06some of the fishing boats became land-based.
41:12Four fishing boats in the harbor
41:14disappeared in the Tenpukutand,
41:16causing serious damage to the fishing boats.
41:19You can't put the boats anywhere.
41:22You can't load or unload them.
41:25You can't cut the boats.
41:28That's very difficult.
41:30Are they that far away?
41:32If they're not there,
41:34there's no depth.
41:36How do you get to the boat?
41:38There's a boat over there.
41:40A small boat?
41:41You get on that boat and cross the sea.
41:45That's difficult.
41:46Yes.
41:47It's at night.
41:50It's not just the boat that's in trouble.
41:54A large amount of water is also a problem.
41:57That's right.
41:58It takes about an hour and a half by boat from here.
42:03They accepted us,
42:07so we catch fish here,
42:10run there,
42:12unload the fish,
42:13and come back again.
42:16The restoration work continues
42:18so that they can work in their current location.
42:24What's even more serious
42:27is the Kuroshima fishing port next door.
42:31The water level in the sea has dropped to zero
42:34and the harbor has become land.
42:40I've been there.
42:42Really?
42:43I've been there.
42:45It's terrible.
42:46The boat can't come in.
42:48What should we do to make it a harbor again?
42:52We have to pull in the sea,
42:54but we can't do it without such a huge construction.
42:57So it won't be a harbor anymore.
43:00I see.
43:02The beach is originally known as
43:04the 100-thousand-meter beach
43:06designated by the Ministry of Environment.
43:09After the quake,
43:13the land area has increased dramatically.
43:17What's surprising is the sand beach
43:20that used to be in the sea.
43:26It's now a rocky beach.
43:33It's not a safe place to play,
43:36so it's closed.
43:39Meanwhile,
43:40people call the map of the sea as a treasure.
43:45It's a national cultural property
43:47and has a history of more than 400 years.
43:50It's Ama-san in Wajima City.
43:56About 120 Ama-sans
43:59go to the beach and swim in the sea.
44:02They go fishing in the sea.
44:08These Ama-sans
44:10used to go fishing in Wajima City.
44:14After the quake,
44:16they lost their fishing gear.
44:19They can't go fishing now.
44:23Is this your fishing spot?
44:25Yes, it is.
44:27I fish here.
44:33The fishing ground used to be in the sea.
44:37They have to look for a new fishing ground.
44:41I see.
44:43Is it hard to find a new fishing ground?
44:46Yes, it is.
44:47It's like you have to dive and look for it.
44:50You have to go back and forth.
44:51You have to look for it while swimming.
44:54If you look at this,
44:56you can see how shallow it is.
45:00Where is the new fishing ground?
45:03It's between the rocks.
45:06I see.
45:07It's easy to fish there.
45:09If you have this, you can go fishing.
45:12This is a treasure map.
45:14Is it?
45:15I see.
45:18They pray that this map will help them to come back to life.
45:25The more I know,
45:27the deeper I think the sea is.
45:30There may be something you don't know.
45:33It's better to know more about the sea.
45:36I think so, too.
45:38If you know too much about the sea,
45:40you won't understand it.
45:41I think so, too.
45:42We have to ask Mr. Unno to lead us.
45:48The sea is full of things we don't know yet.
45:52The adventure of mankind has just begun.