Kaishi Kokusai High School (Tainai City, Niigata Prefecture), a member of the NSG Group, won the 12th 3×3 U18 Japan Championship Final held at Omori Bellport (Tokyo) on Saturday, December 13th and Sunday, December 14th, 2025.
The team “Dangerous”, made up of players from our school’s boys’ basketball club, participated and won the championship.
This tournament is Japan’s premier U18 3×3 tournament, bringing together strong teams that have won qualifying rounds from all over the country.
Our school’s team used its speed and teamwork to advance through the competition and become number one in Japan for the second time.
In addition, Kunitaro Shimizu (3rd year) was selected as MVP for his performance throughout the tournament.
We would like to express our sincere gratitude to everyone who has continued to support us on a daily basis.
Our school’s men’s basketball club will be participating in the Winter Cup, which will be held in Tokyo from December 23rd (Tuesday). Thank you for your continued support.
[Kaishi International High School Boys Basketball Club]
This year marks the 12th anniversary of the club’s founding, and with the motto “Thoroughly done”, we not only provide physical and technical guidance, but also nurture the “spirit” of our students and develop them into players who can play an active role on the world stage.
The club won the Inter-High Championship in its fifth year of existence, and has grown and gained attention from all over the country.
The school was founded in April 2014 at the same time as the school opened.
2016 National High School Comprehensive Athletic Meet Top 8
2018 National High School Comprehensive Athletic Tournament Champion
2019 National High School Comprehensive Athletic Tournament 3rd place
2022 National High School Comprehensive Athletic Tournament Second Place
2022 National High School Basketball Championship Championship Winner
2023 U18 Nissin Foods Top League Champion
[Director Hideki Togashi Profile]
General manager of Kaishi International High School basketball team.
Graduated from Niigata Prefectural Murakami High School and Nippon Sport Science University.
Former head coach of the U-16 Japan National Team.
While a junior high school teacher, he served as the basketball coach at Shibata City Honmaru Junior High School and led it to become the best in Japan.
Became the director of the basketball club at Kaishi Kokusai High School, which opened in 2014.
In 2018, the fifth year since the club was founded, they won the national championship.
Father of B League Chiba Jets player Yuki Togashi.
[Kaishi International High School]
Opened in April 2014 in Tainai City, Niigata Prefecture, this high school is a high school with a completely new concept that has never been seen before in Japan and will be necessary for Japan in the future.It trains true international people, leaders, and specialists who can contribute to the development of the local community, nation, and international society, with four courses as its pillars: “Medical Advancement,” “International Information,” “International Athletes,” and “Athletes.”
“Medical course” course
Our expert instructors teach a special curriculum based on advanced test-taking know-how. We provide detailed support to a select few students to help them pass the exam, and we also actively work on the ethical education necessary for doctors.
“International Information” course
The global environment where students study and live together with many international students will help them develop the “living English,” “useful English,” and “international sensibilities” necessary for students who seek a global stage for their success. We will not only improve your English skills but also develop your comprehensive academic ability in order to pass entrance exams to difficult domestic universities and overseas universities in the future.
“International Athlete” course
This course not only develops the ability to be active as an athlete nationally and internationally, but also focuses on improving academic ability in preparation for future entrance exams at domestic universities and athletes studying abroad at overseas universities. We develop global human resources in an environment where they can develop “living English,” “useful English,” and “international awareness.”
“Athlete” course
In order to take on this huge challenge of developing athletes who will make the leap from Japan to the world, the Athlete Course not only provides coaching from excellent instructors, but also focuses on character development and basic academic ability development. Students spend three years in an environment where they can concentrate on studying and training, and soar towards higher goals.
[Alumni]
We have produced many top athletes, including Ayumu Hirano, gold medalist in the snowboarding halfpipe at the Beijing Winter Olympics, bronze medalists Sena Tomita, Kaiho Hirano, and Ruki Tomita, as well as female professional golfers Ayaka Takahashi, Rio Ishii, and Natsu Honmei.
Ohiko Gakuen Educational Corporation Kaishi Kokusai High School
Location: 439-1 Nagai Nagai Hashikami, Tainai, Niigata Prefecture
URL: https://kaishi-kokusai.ed.jp/
Representative: Yuji Takahashi
The NSG Group is a corporate group consisting of 101 companies that operate a wide range of businesses, including education and medical, welfare, and nursing care businesses, as well as health, sports, construction, real estate, food and agriculture, trading companies, advertising agencies, ICT, hotels, apparel, beauty, human resources services, and entertainment. With the aim of making each region the “richest and happiest city in the world,” we are working from a private perspective to create businesses that revitalize the region, with the keywords of “people,” “peace of mind,” “work,” and “attractiveness.”
https://www.nsg.gr.jp/
