【海外の反応】「なんなんだ！あいつらは⁉︎日本以外ではありえない！」日本の仮設橋に世界が驚愕w【日本のあれこれ】

What is this bridge? I can't imagine anything like this outside of Japan! Good work, everyone! I'm Yuri from Personality. Do you know the bridge called Kasetsu-kyo? Kasetsu-kyo is a bridge built to temporarily secure roads when roads or bridges collapse due to typhoons, floods, and other natural disasters. In addition, it is also used not only for disasters, but also for the replacement of bridges, such as roadways and construction vehicles. This time, I would like to introduce an episode where a Vietnamese woman working in Japan was impressed by the technology of Kasetsu-kyo in Japan. What surprised her when she learned about Kasetsu-kyo, which was built at the end of a novel structure called the Mobile Bridge, and at the time of the Concentration Camp in 2018? Let's take a look! Foreigners are impressed by Japan, the country of manufacturing! My name is Jep. I'm a Vietnamese in my 20s working in Japan. My hobbies are crafts and open-world games. The reason I wanted to get involved in manufacturing was because I've always liked shaping ideas since I was a kid. Vietnamese people are well aware of the beauty of Japanese manufacturing technology. That's why after I graduated from university, I was determined to get a job in Japan. When I first came to Japan, I had a hard time because of the language barrier and I was afraid to go back to Vietnam. But now, I can speak Japanese normally and I have a lot of work and private time. I've made a lot of Japanese friends, so I'm glad I didn't give up. Among my friends, the one I get along with the most is a Japanese woman named Mayako, who works at the same company as me. When I'm with her, I can express my true self and it's a lot of fun to play with her son. Her 7-year-old son's name is Soichiro. Everyone calls him So-chan. He's the same age as me and he loves to make things. Recently, he's especially into building buildings and towns on blocks. When I visit Mayako's house, I go back to my childhood and play with blocks. One day, when I was playing with blocks with So-chan, he made a unique bridge. He made a X-shaped cross-section of the same length of thin long blocks and made several more in a row. It was a very cool structure bridge that a 7-year-old couldn't have imagined. But the bridge wasn't just cool. By connecting X-shaped blocks, it was stronger and more firmly attached than a simple bridge with long blocks. The moment I saw that, I felt an incredible sense of art. I was surprised that an elementary school student came up with the principle that crossing like scissors increases the strength of the bridge. But what surprised me even more was that the design of this bridge exists in Japan. The name of the bridge is Mobile Bridge. It was developed to help people from isolated areas on land during disasters or to carry supplies over the bridge instead of broken roads. As it looks, it's pretty strong. It has a relatively small pump and a thick driving system. It's fast and far-reaching, so it's easy to cross the bridge. What? Wait a minute. What do you mean? I, who like to make things, was fascinated by her story. Then she told me in more detail about the Mobile Bridge. The mobile bridge was designed by a professor at Hiroshima University. As I said, by making it an X-shaped structure, it is possible to shrink and expand the bones of the bridge, and when it is expanded, it becomes a road where vehicles can pass. Moreover, since it is an X-shaped structure, it is excellent in securing safety. In technical terms, this is called a scissors structure, and it seems to be popular in overseas media. It was praised for its high design and safety. But what's great about this bridge is not only the good design and safety. When an earthquake or a natural disaster such as a flood occurs, this mobile bridge enables to secure a quick lifeline and rescue people. If the bridge is transported to a safe place, there is no need to build the foundation of the bridge, and it can be transported anywhere. It is easy to handle because it does not require heavy machinery such as cranes or bolts. Earthquakes, floods, typhoons, tsunamis, and so on have been seen by Japan in many natural disasters so far. Even in the few years since I came to Japan, I feel like I'm being reported in the media. In 2011, the Great East Japan Earthquake occurred. At that time, I was still living in Vietnam, but I remember it vividly because I was reported on the internet and TV the next day. Due to the earthquake and tsunami, the bridge has become unusable on the coast of the Tohoku region, and it has become impossible to carry it. In addition, the transportation of materials is also urgent, but rescue people are prioritized more than that. In emergency situations, rapid and reliable response by a small number of people is necessary. Through the Great East Japan Earthquake, this mobile bridge was developed for the restoration of the Tohoku region, so its potential is very high. Only two people are needed for transportation and installation. As I mentioned earlier, there is no need for a heavy machine or large scaffolding, so the bridge will be completed in a few hours. In addition, when folded, it is a size that can be loaded enough on two trailer trucks. It is also convenient to carry because a lot of lightweight aluminum alloy is used. In addition, there is no need for specialized construction technology. Even ordinary citizens can carry it and assemble it. The weight of the bridge is 12 tons, which is smaller than other bridges, so it is enough to rescue people and secure a lifeline while the bridge is not functioning. In this way, the mobile bridge has the best feeling of use and size at the time of emergency. It can also be equipped with the Nankai Truffle earthquake, which is said to be approaching the X-Day of the occurrence, and I thought that the mobile bridge was a wonderful invention. I know that this technology is world-renowned, but I was impressed when I understood what kind of life would be better if there was actually a life plan. Then I remembered on the mobile bridge, but in Japan, the main road is often blocked by a large-scale landslide due to the disaster, right? In July 2018, the Fukui Prefectural Highway 305 collapsed and flowed into a large amount of land, causing it to be unable to pass through. I saw the video at that time on the Internet, but I thought that it would take a lot of time to build this. Because the road was completely destroyed. However, Japan was surprised and completed the temporary bridge in just two months. To explain in more detail, the disaster area is the sea on the west side of the road, and in the eastern side, a large amount of landslide that collapsed and flowed from a height of about 60 meters blocked the road. So, in order to avoid landslide, a 208-meter temporary bridge was built to slide out to the sea side. However, this temporary bridge is shaped like this, and it has a slightly unusual shape where the right-angled cranks are continuous. The width of the road was estimated to be 6 meters assuming that a large bus would pass through, but a temporary signal device was installed at about 20 meters in front and back of the temporary bridge, and one side passed through alternately. There was no way to make it a little more loose than this temporary bridge. Some people may think that, but the reason why it became a crank was because it used planned goods. If it was designed according to the terrain, it would take time, so it was prioritized to make a temporary bridge and be able to pass through at any time. The construction of the bridge is also a special method The construction began on August 27th, and the temporary bridge was opened on October 31st. In other words, the temporary bridge was completed in just about two months. By the way, the reason for the hasty recovery is that it is important in terms of life and tourism, and there was a request from the Endo local government to open the temporary bridge before the opening of Echizen Crab House on November 6th. Also, this construction was reported by multiple foreign media, and many foreigners were surprised when they saw the completed temporary bridge. I can't believe it will be repaired in such a short period of time. It will take three years in Germany. It will take 10 years in the United States. In Greece, it will take several years to get a license and several years to build it. I don't know if there are many selfish comments like this, but like me, everyone was quite surprised. Also, what I found interesting was the awareness of Japanese people about disasters. Japanese people prepare food and disaster prevention kits in case of an emergency, predict the damage caused by natural disasters, and understand the hazard map that maps the range of damage. On top of that, Japan is not only aware of disasters, but also has the world's top level of disaster prevention. For example, the underground facilities called underground temples and the outdoor waterways in the capital are made using the world's cutting-edge soil and wood technology, and their size is 6.3 km, which is the world's largest. When the rivers are about to flood due to heavy rain, these facilities absorb the flood water from each river. So, after reducing the flow of water in the underground space, they pour water into the nearby river to prevent flooding. When I talk about this, I feel the greatness of Japanese technology. In Vietnam, where I lived, not only the emergency bridge, but also the flood prevention construction is not going well. The reason for that is the special terrain of Japan. As you can see from the map, Japan has a long and narrow terrain. The mountains at an altitude of 1,000 to 3,000 meters run like a spine, dividing the Pacific Ocean and the Japan Sea. So, compared to Europe and the United States, the length of the river is very short and steep. When it rains heavily and the water level of the river increases, if the length of the river is long and the slope is slow, in Europe and the United States, the rain will flow slowly, but what will happen in Japan? Yes, the length of the river is short and the slope is steep, so the rain will flow at once. So, in Japan, flood prevention measures have been implemented for a long time. In the Meiji period, the Dutch poet Johannes de Rijcke, who was sent to build the Joganjigawa River in Toyama Prefecture, said, this is not a river, but a waterfall. The Joganjigawa River he saw has an altitude difference of about 3,000 meters from the current to the riverbed, but the length of the river is only 56 kilometers, which is the world's largest flow rate. The Joganjigawa River in Japan is so special that it is difficult to flood. And this is a side note, but in ancient Japan, there was an existence like Adam and Eve in the West, who were called the gods of Susano'o. Of course, there was no technology for flood prevention in such an era, so there is a legend that they tried to seal the flooding river with magic, such as dragons and monsters. In other words, Japan and the flood have a relationship that has been unbreakable for a long time. To this day, many people have been learning and doing flood prevention to protect their land and lives. I think it's really hard for those who live in Japan, which is called a disaster country. But I think it's also important for Japan to have been able to protect its land and lives. I have a big goal now, which is to send innovative things to my country like the mobile bridge someday. But I'm still not good enough to do that, so I'm going to work in Japan for a while and learn about Japanese manufacturing and disaster prevention. Overseas Reaction I've seen a video of the mobile bridge, and it's a great structure that can be installed immediately after a bridge collapses in an earthquake. This is the progress of technology. If I were to make a hypothesis in my country, I think it would be meaningful to the local residents, such as engineers and environmentalists. I think the mobile bridge will be open over many years. Japanese trains can escape from an earthquake by making seats like slides. It's a great idea to use what you usually use for disaster prevention. When I was working in Japan, many colleagues said they had a disaster prevention set at home. I was surprised by the high awareness of disaster prevention in Japan. It's amazing to build a hypothesis bridge in two months. Isn't Japanese hypothesis bridges more durable than other permanent roads in the world? Summary This time, I introduced advanced hypothesis bridge technology and disaster prevention in Japan There are many people who are surprised by mobile bridges like Magic Hand. Mobile bridges are light and convenient for transportation, so I hope they will be delivered not only to Japan, but also to places where they are needed all over the world and will be useful to the local people. Also, I hope we will be able to raise awareness of disaster prevention from day to day as a country with a large number of mobile bridges. How was it? I would be happy if you could tell me your impressions in the comments. Please give me a high rating and subscribe to my channel. Thank you for watching until the end. See you in the next video.