[Voice of regret from various places] Masatoshi Koshiba died November 13, 20:18
k10012710361_202011132012_202011132014.mp4
Masatoshi Koshiba, who succeeded in observing "neutrinos" and opened up a new field called "neutrino astronomy".
Various voices were heard from all over the world, such as the voice praising the brilliant achievement of receiving the Nobel Prize and the voice praising the friendly personality.
Nobel Prize in Physics Leo Esaki "Sorry for the death of a great researcher"
Leo Esaki, who won the Nobel Prize in Physics in 1973, said, "Mr. Koshiba played a pioneering role in the field of neutrino research, and many young people are now working on research following him. Even though I took the high risk of setting up an observation facility, I think I was able to carry out ambitious research and have made excellent achievements. I am sorry that a great researcher died. "
Nobel Prize in Chemistry Koichi Tanaka "I learned from your appearance"
Koichi Tanaka, an Executive Research Fellow of Shimadzu Corporation, who received the Nobel Prize in Chemistry in 2002, the same as Mr. Koshiba, said, "The media said," Double award. "Mr. Koshiba gave a stick at events after the award. I was strongly impressed by the fact that I was able to walk faster than I was scared, and while smiling, I was able to convey a message to the Japanese people. For a long time, the researchers and engineers who followed me. I learned from Mr. Koshiba, who was brought up a lot. I pray for the souls. "
Chief Cabinet Secretary Kato "Efforts to promote science and technology and foster younger generations"
Chief Cabinet Secretary Kato said, "I would like to express my heartfelt condolences for the death of Professor Koshiba, who has made a great contribution to the development of physics. Not only for his research activities, but also for lectures for students. He was enthusiastic about holding the event and educating young researchers, and he made an effort to promote science and technology and foster younger generations. I would like to pay tribute again and pray for my soul. "
Condolences on Twitter at the US Embassy
The US Embassy told Twitter on the evening of the 13th, "I would like to express my deepest condolences to my family, friends and colleagues for the death of Dr. Masatoshi Koshiba. Dr. Koshiba received a full bright scholarship and was a doctor at Rochester University. He was a prominent physicist who received his doctorate and was also a participant in the exchange program of the Ministry of State, "he said in his condolences.
"The importance of having a dream" that I conveyed in my hometown
In Toyohashi City, Aichi Prefecture, where Mr. Koshiba was born, voices praising his achievements were heard.
A woman in her 80s, who said her husband was a classmate at an elementary school with Mr. Koshiba, said, "Unlike myself, who was a naughty person, Mr. Koshiba was a student from that time, my husband said. I want to. "
A man in his 60s said, "I remember when I won the Nobel Prize. I'm proud of Toyohashi."
A woman in her 40s said, "I knew that Toyohashi had an award related to Mr. Koshiba and was related to the local community. I am proud to have won the Nobel Prize."
Mr. Koshiba attended Higashida Elementary School in Toyohashi City for about a year from the middle of the 4th grade of elementary school, and in 2003, the year after receiving the Nobel Prize, he visited the school and deepened exchanges with his juniors.
The school is decorated with hand-drawn colored paper sent by Mr. Koshiba, and one of them says, "Have a big dream. It takes effort to realize it."
In the courtyard, there is also the word "dream" that Mr. Koshiba cherished and a stone monument engraved with a handprint, which conveys the importance of having a dream.
Yoko Ooka, Vice-Principal of Higashita Elementary School, said, "I want to let the children know Mr. Koshiba's thoughts again and tell him that he will have a dream."
The message "Treasure your dreams" is also sent to Kanagawa's alma mater
Mr. Koshiba moved to Yokosuka City when he was in the 4th grade of elementary school, and graduated from the current municipal Suwa Elementary School in 1945, 81 years ago.
This elementary school also has a corner that collects colored paper and commemorative photos that were sent to children in 2003, saying "Take care of your dreams."
Around it, there are message cards that tell the future dreams of each of the 300 or so students currently enrolled in the school.
Mr. Koshiba was also invited to a ceremony to commemorate the 100th anniversary of the school's founding before receiving the Nobel Prize, and told the children, "Keep your dream eggs."
Principal Rimi Kurokawa of Suwa Elementary School said, "Mr. Koshiba was a big player in communicating the importance of having dreams to children. I am very sorry that he passed away, but I will continue to give him a message. I want to continue teaching in my heart. "
Exhibiting research results At the National Museum of Emerging Science and Innovation
At the National Museum of Emerging Science and Innovation in Koto-ku, Tokyo, a model that is one-tenth the size of "Super-Kamiokande," which is the successor to the neutrino observation facility that Mr. Koshiba first built, and a sensor for observing neutrinos. Introducing the research results along with the actual products of.
Inside the museum, there is also an autographed message from Mr. Koshiba asking visitors the question, "What do you really don't understand in science?"
A second-year high school boy from Chiba said, "I like science, so I want to be involved in research in the future. It's a pity that the great one died, but I think it's important to carry on that wish." I was talking.
Mr. Yasushi Ikebe, who explains the contents of the exhibition for visitors at the National Museum of Emerging Science and Innovation, said, "It is a great achievement to give humankind a new window of observation called neutrino. After receiving the Nobel Prize, Japanese science A lecture was also held at Miraikan, and I remember sending a message to the children that they should value their simple curiosity. "
A regrettable voice in Hida City, Gifu, the hometown of Kamiokande
"Hida Space Science Museum Kamiokarabo" located at the roadside station in Kamioka-cho, Hida City, Gifu Prefecture, opened in March last year to introduce to many people the research on "Kamiokande" that Mr. Koshiba and others have conducted. ..
Last year, about 130,000 people visited by December and touched on Mr. Koshiba's achievements.
A local 80-year-old woman said, "I'm very surprised to hear that she died. I'm just grateful to Mr. Koshiba for making Kamioka famous."
Osamu Kochio, who serves as a guide at the Science Museum, said, "I was a cheerful person. Thanks to Professor Koshiba, this Science Museum was also established, so I will continue to convey the research results of Professor Koshiba to many people from here. I want to go. "
The restaurant at Michi-no-Eki is decorated with a photo of Mr. Koshiba's visit in 2003, and Toshihiro Tahi, Deputy Representative Director of Michi-no-Eki "Sky Dome Kamioka", said, "I'm sorry. He took the name of Kamioka and named it Kamiokande. I'm just grateful for making this land world-famous. "
At the inn in Kamioka-cho, Hida City, which Mr. Koshiba used many times during the construction of Kamiokande, the colored paper "Imagine the Universe and Elementary Particles at Kamioka no Yado" written by Mr. Koshiba is still displayed in the dining room with photos. Has been done.
Mr. Masahiko Shigetoshi, who runs the inn, said, "I often saw Mr. Koshiba, who is enthusiastically instructing students in the room. It was very friendly to me. He was not a scholar. I clearly remember the happy face when Kamiokande was completed. I want to continue to protect the room where Professor Koshiba stayed. "
Junya Tsuzuku, the mayor of Hida City, said, "There are many citizens in Hida City who lively talk about the appearance and kind personality of Professor Koshiba, who is deeply familiar with the local residents and devotes himself to the construction and research of Kamiokande. As the children say, "The pride of Hida City is Super-Kamiokande," how encouraging the citizens of Hida may be. I deeply pay tribute to Professor Koshiba's great achievements and during his lifetime. I am deeply grateful for the friendship with Hida City and the Kamioka area. "
Hida City has set up bookkeeping offices in memory of Mr. Koshiba at three locations in the city, including the roadside station, and will accept books from the 14th to the 20th of this month.
"Take over your will" at Super-Kamiokande
The Kamioka Space Elementary Particle Research Facility of the Institute for Cosmic Ray Research, University of Tokyo, where "Super-Kamiokande", which was built by Mr. Koshiba, is located in Kamioka-cho, Hida City, Gifu Prefecture, held a meeting on the evening of the 13th. ..
Among them, Mr. Masayuki Nakahata, a student of Mr. Koshiba, said about the time when he studied with Mr. Koshiba, "Professor Koshiba was not only a pioneer in neutrinos, particle physics research, and physical experiments. He was a charismatic researcher. It was a busy and difficult day, but he made new discoveries one after another and enjoyed his research. I am grateful to the teacher who gave me the opportunity to do my research. " It was.
On top of that, he said, "I can study neutrinos in Japan now because of the results that Professor Koshiba has built at Kamiokande. I want to carry on my will and continue my research."
Professor Yoshitaka Ito of the Institute for Space-Earth Environmental Research, Nagoya University, who is studying neutrinos at "Super-Kamiokande," said about Mr. Koshiba, "I have not received direct guidance from Mr. Koshiba or researched with him. It was charismatic. "
Regarding Mr. Koshiba's achievements, "We launched the field of researching both space and elementary particles using neutrinos and fostered many excellent researchers. It was the reason why Japan was able to produce first-class results in this field. This is Mr. Koshiba's greatest achievement. Without Mr. Koshiba, I think that the research institute would not have been successful in Kamioka. Next, the story of making hypercamiokande is progressing, and I think that big discoveries will continue. In that sense, Mr. Koshiba sowed the seeds of great discoveries for decades. I think that no one but Mr. Koshiba could do it. I followed Mr. Koshiba's pioneer who challenged from nothing and connected to the next. I want to go. "
Looking back on about 10 years ago when I participated in an event held at a high school in Nagoya with Mr. Koshiba, I was trying to tell high school students that it is important to work hard toward your dreams. He was a friendly person without decorating. It was also popular with high school students. "
The detector used in Kamiokande At the company in Shizuoka that developed it
The "Kamiokande" researched by Mr. Koshiba uses a detector developed by the optical equipment manufacturer "Hamamatsu Photonics" headquartered in Hamamatsu City, Shizuoka Prefecture, which is the source of elementary particles called neutrinos. It was the first time in the world to succeed in observing one.
According to the company, Mr. Koshiba's award made the company name known in the world of physics, which was a big turning point for the company.
Kenji Suzuki, who was in charge of the development of the detector at that time, said, "I visited the university every time I made a product and was taught. It was a difficult job at that time, and I remember having a hard time being told that it was difficult. However, I was able to learn the fun of development through this work. The encounter with Mr. Koshiba was very big both as an individual and as a company. "
"The last time I saw him was a farewell party when our chairman died two years ago. At that time, I was in a wheelchair and was present, so I was just surprised to hear that he died. I pray for the souls from the bottom of my heart. "
Curator of Saga Space Science Museum "I want to convey the fun of science"
Mr. Koshiba often holds lectures in Saga Prefecture to convey the romance of space and the appeal of research, and his thoughts have been passed down.
At the "Prefectural Space Science Museum" in Takeo City, Saga Prefecture, a facility that conveys the origins of the universe and the earth to children, the same device that Mr. Koshiba observed neutrinos is on display with a handwritten signature.
The sign was given to Noriko Tsutsumi, a curator of the Space Science Museum, who was impressed by hearing Mr. Koshiba's lecture at Saga University in 2009, 11 years ago, when he set up a corner to introduce Mr. Koshiba's achievements. Thing.
The sign that Mr. Koshiba gave as a "message to children" is written as "space human elementary particles".
Mr. Tsutsumi said, "I was surprised at the news of the sudden death. The universe is very large and the elementary particles are invisiblely small. Every time I see that we are human beings in the meantime, Mr. Koshiba makes me think. I was conscious of nurturing younger generations, and many people were inspired in Saga. I would like to convey the fun of science like Mr. Koshiba. "
"Hyper-Kamiokande", the successor facility that inherits Mr. Koshiba's thoughts
Mr. Koshiba himself led the design of the neutrino observation facility "Kamiokande", one of the elementary particles that form the basis of matter, and succeeded in observing neutrinos.
After that, the successor facility "Super-Kamiokande" with improved performance was built, and Mr. Takaaki Kajita, a junior of Mr. Koshiba, observed a phenomenon called "neutrino oscillation" for the first time, which led to the Nobel Prize.
And, the work for the construction of the higher performance observation facility "Hyper-Kamiokande" has started in the basement of the same Hida city, Gifu prefecture where the Kamiokande and Super-Kamiokande were made, aiming to start the experiment in 2027. Investigations are being conducted.
One of the research themes of Hyper-Kamiokande is the observation of proton decay, in which the protons that make up the atomic nucleus are destroyed.
Observation of this proton decay was one of the themes that Mr. Koshiba aimed at when he made Kamiokande, but it has not been achieved so far.
If observations can be made with Hyper-Kamiokande, it is expected that there will be a possibility to prove a "Grand Unified Theory" that goes beyond the "Standard Model" of current physics.
Professor Masato Shiozawa of the Institute for Cosmic Ray Research, the University of Tokyo, who is the project leader of the "Hyper-Kamiokande" project, said, "Professor Koshiba is a pioneer of neutrino research and it is very disappointing that he died. I definitely want to observe the decay of neutrinos with Hyper-Kamiokande and achieve the teacher's purpose. "