Official iOS game

Play Japanese Riichi Mahjong Anytime, Anywhere

Enjoy Japanese Riichi Mahjong with 13 Orphans Mahjong. Play against computer opponents, practice your strategy, and enjoy the game wherever you go.

Free on the App Store · iPhone · Offline play

13 Orphans Mahjong Riichi game table with computer opponents — A focused Riichi table for practice, play, and learning.

Made for Riichi players

A clear way to learn and play

13 Orphans Mahjong keeps the table focused: learn the rules, play complete matches, and practice your decisions without needing a live table or an internet connection.

Play full Riichi matches

Play against three computer opponents in East-only or full Hanchan games.

Learn as you play

Use the built-in Riichi Guide to review tiles, terminology, calls, and scoring concepts.

Authentic rules and scoring

Chi, Pon, Kan, Riichi, Ron, Tsumo, Dora, points, and round progression are handled in the game.

Practice offline

No account required. Play without an internet connection and resume an unfinished game later.

Inside 13 Orphans Mahjong

See the table in action

From the first menu to the middle of a hand, the game gives you a straightforward place to practice Japanese Riichi Mahjong.

13 Orphans Mahjong game table during a Riichi hand — Practice a complete hand against computer opponents.

13 Orphans Mahjong main menu with Start Game, Settings, and Help — Start a game, adjust settings, or open Help.

13 Orphans Mahjong Riichi Guide showing tile references and terms — Review Riichi terms and tile references in the built-in guide.

Keep playing beyond the app

Learn, score, and meet at the table

The game is one part of 13 Orphans. Use the free web tools to study and score physical games, then join the Club for real Mahjong tables across Metro Manila.

13 Orphans Calculator — Score physical Mahjong hands on the web across Riichi, MCR, Hong Kong, and Taiwanese rules.
Riichi Mahjong scoring guide — Review han, fu, yaku, and payment context before or after a game.
13 Orphans Mahjong events — Find community tables and Club gatherings in Metro Manila and Quezon City.

Ready to play?

Take Riichi Mahjong with you.

Download 13 Orphans Mahjong for iPhone and play a focused game wherever you are.

Also explore the 13 Orphans Calculator, Club events, or return to the 13 Orphans home page.