符計算を覚えるならこれ！
AIとの対局を楽しみながら符計算を覚えられるのがすごくいいです。実際の手牌で確認できるので、自然と符の考え方が身につきます。麻雀は打てるけど符計算は苦手、という人におすすめ。
符計算
AIとの対戦で符計算覚えられるシステムはいい。他にないシステム。音楽もいい。ビジュアルと操作感は改善していって欲しい。
$0.99
About
Learn, practice, and play Japanese riichi mahjong with this comprehensive app. It offers tile-based lessons, AI opponents, scoring training, and online multiplayer options. Switch between English and Japanese languages easily.
✓Tile-based lessons and quizzes
✓Spaced repetition for review
✓3D AI opponents (4 or 3 player)
✓Scoring training with explanations
✓Online multiplayer with private rooms
✓Offline play for lessons and AI matches
✓English and Japanese language support
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What's New in Mahjong Book
2.5
September 15, 2026
Version 2.5 adds Chapter VII: Tile Efficiency and a Music Library. • Four lessons on shanten, ukeire, visible tiles and lookahead • A local lab comparing every discard over your next two draws • Generated exercises and custom hand / visible-tile input • A unified interface across Study, Play, Collection, Yaku and Glossary • Offline Play now appears above Online Play • Listen to all 19 bundled tracks, with seeking, repeat and shuffle The lab compares a stated tile set, target and two-draw model. It does not estimate real-game win rates, value or defense. --- 日本語 --- 2.5では、第7章「牌効率」とミュージックプレイヤーを追加しました。 ・向聴数、受け入れ、見えている牌、先読みを学ぶ4課を追加 ・全打牌候補と自分の2ツモ先を、端末内で計算して比較する演習 ・新しい練習手の生成、自分の牌姿と見えている牌の入力に対応 ・修練・対局・名鑑・役典・用語のデザインを統一 ・オフライン対戦の入口をオンライン対戦より上へ移動 ・全19曲を聴ける音楽の書架。曲送り、再生位置、リピート、シャッフルに対応 牌効率演習は、指定した牌構成・目標・2ツモという条件での比較です。実戦の和了率・勝率、打点や守備を評価するものではありません。
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FAQ
What is Mahjong Book?
Mahjong Book is a paid application designed to help users learn, score, and play Japanese riichi mahjong. It offers interactive lessons, AI opponents for practice, and online multiplayer functionality. The app was last updated on September 9, 2026.
Does Mahjong Book have ads?
No, Mahjong Book is completely ad-free. The developer explicitly states 'No ads, no in-app purchases and no gambling' in the app description. This ensures an uninterrupted learning and playing experience.
Can I play Mahjong Book offline?
Yes, Mahjong Book supports offline play for its lessons and AI matches. This allows you to practice and learn the game mechanics even without an internet connection.
What devices does Mahjong Book support?
Mahjong Book is available for iPhone and iPod devices. It is rated for ages 4 and up, making it suitable for a wide range of users.
How does the scoring training work in Mahjong Book?
The scoring training feature presents winning hands from AI matches and asks you to calculate the fu and score. It provides explanations for correct and incorrect answers, detailing hand payments, honba bonuses, and riichi deposits separately.
Can I play Mahjong Book with friends?
Yes, you can play with friends by creating a private room using a 4-digit code. For worldwide play, you can join a global table, which will fill empty seats with AI after two minutes if human players are not found.
What is the price of Mahjong Book?
Mahjong Book is a one-time purchase priced at $0.99. There are no additional in-app purchases or subscription fees required to access all features.
How often is Mahjong Book updated?
The app was last updated on September 9, 2026, with version 2.0. This indicates a recent update, suggesting ongoing support and potential for future improvements.