Turn every draw into a better discard decision.
“Mahjong Solo Issou” is a solo riichi mahjong training app designed to improve tile efficiency and offensive decision-making.

Draw tiles automatically, choose what to discard each turn, and work your way toward tenpai. Track changes in shanten and ukeire, then compare your choices with recommended discards based on win probability and expected points.

Build stronger judgment through practice—not just intuition.

【Two Training Modes】
■ Practice Mode
Start with a random hand and a shuffled wall. Adapt to every draw and aim for tenpai in a realistic flow.

■ Learning Mode
Practice specific hand shapes and themes, including five-block hands, hands without a pair, multiple pairs, complex waits, and flush hands. You can also build a custom 14-tile hand and train from any position you choose.

【Key Features】
- Track shanten and ukeire while you play
- Compare your discard with recommended choices
- Review win probability and expected points
- See optimal plays and key turning points after each session
- Track your score and personal best
- Replay past sessions turn by turn
- Save favorite hands and practice them again
- Analyze tenpai rate, average tenpai turn, and thinking time
- Set a turn timer to 5, 30, or 60 seconds—or play without a limit
- Available in Japanese, English, and Chinese
Some learning content, play history, performance analytics, and ad removal require the Premium Plan.

【Recommended For】
- Beginners who are unsure what to discard
- Players who want to learn tile efficiency
- Players who want to consider both ukeire and hand value
- Anyone who wants to compare their decisions with recommended plays
- Players who want to repeat difficult hand shapes
- Anyone looking for focused mahjong practice in short sessions
Every discard is a chance to improve.
Train your decision-making with Mahjong Solo Issou.