About Mahjong Lab - Professional Training
Mahjong Lab is an online mahjong training platform focused on tile efficiency and in-game decisions. We break core skills—tenpai recognition, discard choices, shanten calculation, and yaku recognition—into repeatable drills, paired with hand analysis and docs so you can improve systematically.
What we offer
The platform includes tenpai, discard, shanten, one-shanten acceptance, one-shanten discard, and yaku recognition training, plus hand analysis. Every drill gives instant feedback so you can see the correct line even when you miss—useful from beginner to advanced stages.
How to practice
Open the training hub and pick a mode. Practice and timed runs are both supported; sign in to save scores and join leaderboards. A sensible path is tenpai and shanten first, then discard and one-shanten drills, plus yaku recognition when you want to sharpen reading han.
How to learn alongside drills
Beyond drills, we publish guides on efficiency, discards, and scoring. Reading a concept first, then practicing it, is often more effective than grinding without context.
About the team
Mahjong Lab is maintained by the MJ Lab team, focused on mahjong tile logic and efficiency practice. We keep improving training, docs, and analysis—reach out via the contact page with feedback or issues.