This is a free browser-based game app that lets you easily enjoy authentic Riichi Mahjong. It features East Wind gameplay, inspired by the Toufuusou mahjong platform. ■ Main Features ・Authentic 4-player Riichi Mahjong ・Three AI difficulty settings (Weak/Normal/Strong) to match your skill level ・Includes an 8-lesson tutorial mode for beginners ・Supports three languages: Japanese, English, and Chinese ・Play with friends via LAN/online ・Fully implements authentic Mahjong rules, including hand determination, scoring, Dora, Riichi, Tsumo, Ron, and calling (Pon, Chi, Kan) ■ Recommended for: ・Beginners who want to start playing Mahjong ・Those who want to play against an authentic Mahjong AI ・Those who want to enjoy online Mahjong with friends ・Those who want to play Mahjong casually during commutes or in their free time ・Those who want to enjoy authentic Mahjong on the go ■ Comprehensive Tutorial Function Includes an 8-lesson tutorial mode, making it easy for beginners to start playing Mahjong. Lesson 1: Tile Type Quiz Lesson 2: Basics of Sets and Pairs Lesson 3: Declaring Riichi Lesson 4: Yakuhai (Scoring Tiles) Lesson 5: Tanyao (All Simples) Lesson 6: Pinfu (No-Peace Hand) Lesson 7: Dora Bonus Lesson 8: The Importance of Closed Hands Learn step-by-step in a practical format, from basic tile types to hand formation, declaring Riichi, and winning. There are also quiz-style lessons, making learning Mahjong fun. ■ AI Battle Mode Choose from 3 AI difficulty levels: Weak, Normal, and Strong. Weak - Recommended for beginners Normal - Just the right difficulty for those who have learned the basic rules Strong - For those seeking matches against advanced players You can gradually increase your difficulty level according to your own abilities. ■ Online Battle Function Includes LAN battle functionality for playing with friends. Enjoy authentic 4-player Mahjong with friends in different locations. You can easily start a match by simply sharing the Room ID (room number). ■ Simple and Intuitive Controls With intuitive touch controls, anyone can easily play. Actions such as dragging tiles, declaring "reach," and calling tiles are all implemented with a visually easy-to-understand interface. ■ Multilingual Support Fully supports three languages: Japanese, English, and Chinese. You can easily switch languages ​​from the app settings. Enjoyable not only for Japanese-speaking users but also for mahjong fans overseas. ■ About Ads This app is provided free of charge through advertising revenue. Pop-up ads will appear between rounds, but they are designed not to interfere with gameplay. ■ Safe Gaming Environment • No in-app purchases • No gambling elements involving real money • In-game points and scores are valid only within the game and cannot be exchanged for cash or other valuables • No personal information is collected ■ Operating Environment • Android 5.0 or higher • Internet connection (only required for initial launch) • Offline play is possible from the second time onwards ■ Supported Languages • Japanese • English • Chinese You can easily switch languages ​​from the app settings. ■ Message from the Developer We developed this app with the aim of making authentic Mahjong easily accessible to everyone. For beginners, we provide a comprehensive tutorial to convey the fun of Mahjong, and for advanced players, we offer tense matches against strong AI. Based on your feedback, we will continue to add features and make improvements. If you have any opinions or requests, please let us know through app reviews or inquiries. We hope you enjoy the game.