Computer Mahjong Downloads & RevenueComputer Mahjong · App Store

Computer Mahjong is an authentic four-player mahjong game that even beginners can enjoy. A long-selling title with over 3 million downloads in total, it is back on the App Store.
Your opponents are colorful warlords of Japan's Sengoku era. Enjoy the take-your-time "Beginner Mode", handy assist features for beginners, a wide range of local rules and local yaku for experienced players, rich options such as "Time Limit" and "Discard Effects", and "Custom Match", where you can set up a position tile by tile and play it.

◆If you bought it before, you are a "Founder Member"
If you purchased the paid version of Yonin Mahjong on the App Store before, download it with the same Apple ID and you will automatically become a "Founder Member". The Founder mark "FOUNDER" appears at the top left of the title screen. Founder Members can enjoy the following benefits for as long as the app continues to be distributed:
• No ads
• No time limit when offline
• No limit on data transfer size
• More "Favorites" slots in Game Record Management

◆Main features
• Innovative "One-Person, Four-Role Mahjong" mode with a rotating table
• Three modes: "Free Match", "Elimination Match" and "Custom Match"
• Take-your-time "Beginner Mode"
• In "Custom Match", you can even set how opponents play (e.g., "tsumogiri")
• Random numbers generated with the "Mersenne Twister"
• Fair tile walls built by the "Tile Manipulation Prevention" feature
• 60 unique "Sengoku warlords" as opponents
• About 300 "local yaku (rules)" to choose from
(including special rules such as "Wareme" and "Alice")
• Many settings for beginners, including "Assist Mode"
• About 400 statistics, viewable as rankings
• Replay past games with "Game Records"
• Recreate positions from game records in "Custom Match"
• Customize themes, use "black tiles" and more
• Data transfer for changing devices
• "OFFLINE PLAY SYSTEM" for playing offline
• Choose how ads are shown: "part of the screen" or "full screen after each hand"
• "Prime Membership (subscription)" without ads

◆Opponents
Oda Nobunaga / Akechi Mitsuhide / Maeda Toshiie / Toyotomi Hideyoshi / Ishida Mitsunari / Kobayakawa Hideaki / Yamauchi Kazutoyo / Tokugawa Ieyasu / Takeda Shingen / Uesugi Kenshin / Mori Motonari / Date Masamune / Shimazu Yoshihiro / Azai Nagamasa / Sanada Yukimura / Shibata Katsuie / Naoe Kanetsugu / Kato Kiyomasa / Takenaka Shigeharu / Honda Tadakatsu / Otani Yoshitsugu / Maeda Keiji / Hojo Ujiyasu / Kuroda Josui / Chosokabe Motochika / Shima Sakon / Todo Takatora / Imagawa Ujizane / Yamana Toyokuni / Tachibana Muneshige
...and many more Sengoku warlords to play against!

◆Language
The app is available in Japanese only.

◆Conditions of use
The app is designed to be used online, but its "OFFLINE PLAY SYSTEM" also lets you play offline. For details, see "Settings" in the app.

◆Supported devices
Supports devices running iOS 26.0 or later. Depending on the device's specifications, the app may not run smoothly.

◆Licenses
The app includes works