Sega MJ x Oreimo
2025-06-02 08:05:54

Sega NET Mahjong 'MJ' Teams Up with 'Oreimo' for Exciting Tournament

Sega NET Mahjong 'MJ' and 'Oreimo' Collaboration: Nationwide Tournament to Begin



Sega has announced an exciting new collaboration between its popular networked Mahjong game series, 'MJ', and the acclaimed television anime 'Oreimo' (My Little Sister Is Among Them!). Starting from June 2, 2025, the nationwide tournament titled "Oreimo CUP" will kick off, featuring various special in-game items inspired by the anime, including unique winning effects and table backgrounds.

Overview of the 'Oreimo CUP' Nationwide Tournament



This tournament will be accessible on both the app and arcade versions of 'MJ', inviting players to enjoy thrilling matches based on the beloved anime. Competitions consist of two formats: the East Wind game and a three-player variant, where participants accumulate scores. Players achieving above a set score during the qualifying rounds will advance to the finals, where the player with the highest score will take home the championship title.

In the app version of 'MJ', players can obtain various Oreimo-themed items by participating in the tournament and fulfilling certain requirements, such as winning buttons and table backgrounds reflecting the series.

Schedule of the Tournament


  • - Qualifying Round A
Period: June 2 (Monday) – June 8 (Sunday)
Entry Time: 24 hours (Start: June 2, 7:00 – End: June 8, 29:59)

  • - Qualifying Round B
Period: June 9 (Monday) – June 15 (Sunday)
Entry Time: 24 hours (Start: June 9, 7:00 – End: June 15, 29:59)

  • - Finals
Period: June 16 (Monday) – June 22 (Sunday)
Entry Time: 24 hours (Start: June 16, 7:00 – End: June 22, 29:59)

Special Rewards Featuring 'Oreimo' Items


Numerous collaboration items inspired by 'Oreimo' will be available as event rewards during the tournament, including:

  • - Evolutionary SP Character (SSR):
- Ayase Aragaki

  • - Table Backgrounds:
Six different designs, including:
- Black Cat Background 1
- Ayase Background 1
- Kirino and Kyousuke Background 2

  • - EX Backgrounds:
Six unique designs that include:
- Kirino's PC Background
- Event Venue Background
- Meruru's Background

  • - Winning Buttons:
- Kyousuke Button
- Kirino Button

  • - Winning Effects:
- Black Cat Effect

'Oreimo Gacha' Events


Between June 2 and June 22, players can also participate in the 'Oreimo Gacha', which features:

  • - Evolutionary SP Characters (SSR) including:
- Kirino Kousaka
- Kyousuke Kousaka
- Black Cat

Additional collaboration items across 38 types will become available, including winning effects, table backgrounds, EX items, among others.

  • - Spin Price: 500G per draw

Arcade Version of 'MJAC'


For players enjoying the arcade version, the tournament will run the same dates as the app version. The qualifying rounds will open from 10:00 AM to 12:00 AM daily. Players can earn special rewards by collecting points based on their ranks or through visit-related stamps.

Special Rewards Include:


  • - Voice-Enabled SP Characters:
Viewers will get to meet:
- Black Cat
- Ayase Aragaki

  • - Table Backgrounds:
Offering three different designs featuring:
- Kirino's Table Background 1
- Black Cat's Table Background 1
- Meruru's Background

Special Campaigns to Celebrate the Collaboration


In addition, the collaboration will host a special campaign running from June 2 to June 21, 2025, allowing fans to join a follow-and-repost event on social media. Eight lucky participants selected in a lottery will win signed merchandise by voice actors from the series.

To participate, follow the official 'MJ' X account (@sega_MJ) and retweet the campaign post. Winners will be contacted directly through DMs on X, so ensure you're following the account.

About 'Oreimo' TV Anime


The anime based on the light novel series by Tsukasa Fushimi has captivated audiences since its premiere. It tells the story of Kyousuke Kousaka, an ordinary high school student, who discovers his younger sister Kirino's secret life, leading to a series of comedic and heartfelt experiences.

Since its debut, 'Oreimo' has had two seasons, becoming popular not only for its engaging storyline but also for its unique dual ending approach on TV and web distribution.

For more details, visit the official anime site: Oreimo Anime.

About Sega NET Mahjong 'MJ'


Sega NET Mahjong 'MJ' offers an unparalleled Mahjong experience, with realistic graphics and immersive gameplay available on smartphones and PCs. Known for its high-level arcade standards, it ensures thrilling matches with engaging animations.

  • - Supported Platforms: iOS / Android / Windows / MAC
  • - Release Dates:
- iOS: July 25, 2013
- Android: February 27, 2014
- PC: November 19, 2013
  • - Official Links:
- App Store
- Google Play

The collaboration of 'MJ' and 'Oreimo' promises an exciting season for both Mahjong enthusiasts and anime fans alike!


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Topics Entertainment & Media)

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