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Sega NET Mahjong MJ Official Event Announcement

Get ready, Mahjong fans! Sega has unveiled an exciting opportunity for its players. On February 21, 2026, the "Sega NET Mahjong MJ Official Offline Event" will take place at Sega's headquarters in Osaki, Tokyo. This unique event allows users to compete directly against professional Mahjong players using the "MJ App". Today marks the opening of applications for participants to join this thrilling experience!

Event Details

Date: February 21, 2026
Time: 13:00 - 18:00 (doors open at 12:00)
Location: Sega Osaki Headquarters
Address: 1-1-1 Nishi-Shinagawa, Shinagawa-ku, Tokyo in Sumitomo Realty Osaki Garden Tower
Location Access
Expected Attendance: 108 participants
Participation Fee: Free

To secure a spot, interested individuals need to fill out the application form available here by January 12, 2026, at 23:59.

Registration and Selection

Participants will be randomly selected from the applications submitted before the deadline. Those who are lucky enough to be chosen will receive an email notification in late January 2026. To confirm your participation, simply reply to the selection email.

Special Guests

This event features an impressive lineup of 12 professional Mahjong players, including:

• - Seichi Kondo
• - Genta Takeuchi
• - Ken Sonoda
• - Yoshihiro Matsumoto
• - Emu Aikawa
• - Takanori Nagai
• - Yuri Shin-ei
• - Yui Kageyama
• - Miharu Kawashima
• - Mayu Kanno
• - Momoko Suzuki
• - Shoa Saito

Please note that due to unforeseen circumstances like health issues, scheduled professional players may not be able to attend. We appreciate your understanding.

Additional Information

Photographs and videos taken during the event will be used by the organizer on their website, magazines, or various media outlets. By applying, you consent to the potential use of such images.

For further details, please refer to the official application form for the "Sega NET Mahjong MJ Official Offline Event".

What is Sega NET Mahjong MJ?

Sega NET Mahjong MJ is the pinnacle of arcade Mahjong gaming, offering an immersive experience with realistic tile action and thrilling gameplay dynamics. It’s available on multiple platforms including iOS, Android, and PC, allowing players to enjoy the excitement of Mahjong anywhere.

• - Game Title: Sega NET Mahjong MJ
• - Supported OS: iOS / Android / Windows / Mac
• - Release Dates:

- iOS: July 25, 2013
- Android: February 27, 2014
- PC: November 19, 2013
- PC Browser Version: January 21, 2025

• - Price: Free-to-play (with in-app purchases)
• - Genre: Table Game
• - Manufacturer: Sega
• - Copyright: ©SEGA
• - Official Website:

MJ Series Portal
MJ App Official HP
MJ App X
MJAC Official HP

For players looking to engage deeper into the world of Mahjong, participating in the Sega NET Mahjong MJ Official Offline Event is an opportunity not to be missed!