<50 Days Until Tournament> SEGA SAMMY HOLDINGS INC. Appointed Official Venue Partner for 4th SASSEN National Tournament
SEGA SAMMY HOLDINGS has been selected as the official venue partner for the 4th SASSEN National Tournament. As a result, the tournament venue will change to "TUNNEL TOKYO," a co-working space operated by Sega Sammy Innovation Inc., providing an immersive experience that maximizes the appeal of the digital chambara "SASSEN."
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- 📰 Published: April 26, 2026 at 17:00
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Today, 50 days before the national tournament, the General Incorporated Association All Japan SASSEN Association (Chairman: Ryoma Motomura) announces that SEGA SAMMY HOLDINGS INC. has been selected as the official venue partner for the 4th SASSEN National Tournament, a digital chambara event, to be held on Sunday, June 14, 2026.
Accordingly, the venue will change from Hibiya Sky Conference to "TUNNEL TOKYO" (Sumitomo Fudosan Osaki Garden Tower 9F, 1-1-1 Nishi-Shinagawa, Shinagawa-ku, Tokyo), operated by Sega Sammy Innovation Inc., a wholly-owned subsidiary of SEGA SAMMY HOLDINGS INC.
Based on the concept "Let's change the game," TUNNEL TOKYO was launched in October 2018. It is a co-working space widely used by numerous startups and sole proprietors, aiming to foster new businesses and ideas by facilitating direct interaction between Sega Sammy Group employees and external talent, and promoting communication among member companies.
The facility's open lounge features a large LED signage "TUNNEL GRAND VISION" with a width of 20 meters and a height of 3 meters, enabling a wide range of uses such as transmitting various video contents and serving as a screen for events and seminars. Furthermore, the "BIG GATE TUNNEL," which connects the open lounge and the member lounge, is a space designed to stimulate creativity, expressing a journey towards aiming for new challenges and becoming a Game Changer.
Sega Sammy Innovation Inc., established in April 2026 with the aim of further promoting open innovation, will be responsible for the operation of the facility, seeking to create synergy through collaboration at the SASSEN National Tournament.
Comment from Ryoei Ikeda, Director of Sega Sammy Innovation Inc.:
"SASSEN possesses digital fairness and splendor, the enjoyment of sports, and the tension of martial arts. I feel that it has a very high affinity with TUNNEL TOKYO's large LED signage. We hope that you will experience the best immersive feeling through the synergistic effect with the venue.
Please look forward to this tournament, which will be an unprecedented stage for players, as SASSEN will attract even more attention in Tokyo's premier venue, where its charm can be expressed even further."
■ Partner Recruitment ■
The 4th SASSEN National Tournament is recruiting companies and organizations that can help make the tournament a success. As a next-generation Japanese sport born from digital x martial arts, "SASSEN," which can be enjoyed by people of all ages and genders, is attracting attention as a new sport. Please feel free to consult us about sponsorships and collaborations.
【Contact】
Promotion Partner
Japan Convention Services Inc.
Contact: Naoki Tanabe
Email: sports@convention.co.jp
■ What is SASSEN? ■
SASSEN is a competition based on self-defense techniques practiced by Chairman Motomura at a martial arts dojo. Feeling the limitations of visual judging and dissatisfaction with vague decisions, he adopted the concept of "reviving samurai matches in the modern age." It is a digital chambara born from the desire to create "a sport where spectators, fighters, and referees can all be satisfied" through IT technology.
■ Tournament Outline ■
Tournament Name:
The 4th SASSEN National Tournament
All Japan SASSEN Championship 2026
Date and Time:
Sunday, June 14, 2026
10:00 - 18:00 (scheduled)
Organizer:
General Incorporated Association All Japan SASSEN Association
Sponsor:
SATSUZEN Co., Ltd.
Cooperation:
SEGA SAMMY HOLDINGS INC.
Japan Convention Services Inc.
Official Tournament Website:
https://sassen.jp/sassen_japan_cup_2026/
Participant Entry Form
Deadline: May 31 (Sun)
【 Individual General Category (13 years and older) 】
【 Individual Children's Category (12 years and younger) 】
【 Team Category (4 people per team) 】
*Registration may close early if capacity is reached.
Venue:
TUNNEL TOKYO
(6-minute walk from JR/Rinkai Line Osaki Station South Exit)
1-1-1 Nishi-Shinagawa, Shinagawa-ku, Tokyo
Sumitomo Fudosan Osaki Garden Tower 9F
https://tunnel-tokyo.jp/Home
The latest information about our organization is
Official Instagram @sassenjp
Official X @sassen_frkz
where we regularly share activity scenes and event information.
Accordingly, the venue will change from Hibiya Sky Conference to "TUNNEL TOKYO" (Sumitomo Fudosan Osaki Garden Tower 9F, 1-1-1 Nishi-Shinagawa, Shinagawa-ku, Tokyo), operated by Sega Sammy Innovation Inc., a wholly-owned subsidiary of SEGA SAMMY HOLDINGS INC.
Based on the concept "Let's change the game," TUNNEL TOKYO was launched in October 2018. It is a co-working space widely used by numerous startups and sole proprietors, aiming to foster new businesses and ideas by facilitating direct interaction between Sega Sammy Group employees and external talent, and promoting communication among member companies.
The facility's open lounge features a large LED signage "TUNNEL GRAND VISION" with a width of 20 meters and a height of 3 meters, enabling a wide range of uses such as transmitting various video contents and serving as a screen for events and seminars. Furthermore, the "BIG GATE TUNNEL," which connects the open lounge and the member lounge, is a space designed to stimulate creativity, expressing a journey towards aiming for new challenges and becoming a Game Changer.
Sega Sammy Innovation Inc., established in April 2026 with the aim of further promoting open innovation, will be responsible for the operation of the facility, seeking to create synergy through collaboration at the SASSEN National Tournament.
Comment from Ryoei Ikeda, Director of Sega Sammy Innovation Inc.:
"SASSEN possesses digital fairness and splendor, the enjoyment of sports, and the tension of martial arts. I feel that it has a very high affinity with TUNNEL TOKYO's large LED signage. We hope that you will experience the best immersive feeling through the synergistic effect with the venue.
Please look forward to this tournament, which will be an unprecedented stage for players, as SASSEN will attract even more attention in Tokyo's premier venue, where its charm can be expressed even further."
■ Partner Recruitment ■
The 4th SASSEN National Tournament is recruiting companies and organizations that can help make the tournament a success. As a next-generation Japanese sport born from digital x martial arts, "SASSEN," which can be enjoyed by people of all ages and genders, is attracting attention as a new sport. Please feel free to consult us about sponsorships and collaborations.
【Contact】
Promotion Partner
Japan Convention Services Inc.
Contact: Naoki Tanabe
Email: sports@convention.co.jp
■ What is SASSEN? ■
SASSEN is a competition based on self-defense techniques practiced by Chairman Motomura at a martial arts dojo. Feeling the limitations of visual judging and dissatisfaction with vague decisions, he adopted the concept of "reviving samurai matches in the modern age." It is a digital chambara born from the desire to create "a sport where spectators, fighters, and referees can all be satisfied" through IT technology.
■ Tournament Outline ■
Tournament Name:
The 4th SASSEN National Tournament
All Japan SASSEN Championship 2026
Date and Time:
Sunday, June 14, 2026
10:00 - 18:00 (scheduled)
Organizer:
General Incorporated Association All Japan SASSEN Association
Sponsor:
SATSUZEN Co., Ltd.
Cooperation:
SEGA SAMMY HOLDINGS INC.
Japan Convention Services Inc.
Official Tournament Website:
https://sassen.jp/sassen_japan_cup_2026/
Participant Entry Form
Deadline: May 31 (Sun)
【 Individual General Category (13 years and older) 】
【 Individual Children's Category (12 years and younger) 】
【 Team Category (4 people per team) 】
*Registration may close early if capacity is reached.
Venue:
TUNNEL TOKYO
(6-minute walk from JR/Rinkai Line Osaki Station South Exit)
1-1-1 Nishi-Shinagawa, Shinagawa-ku, Tokyo
Sumitomo Fudosan Osaki Garden Tower 9F
https://tunnel-tokyo.jp/Home
The latest information about our organization is
Official Instagram @sassenjp
Official X @sassen_frkz
where we regularly share activity scenes and event information.