Riichi Mahjong: The Art of the Yaku
Like Duolingo, but for Riichi Mahjong: The Art of the Yaku. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
Free forever · No credit card · iPhone & Android

Key ideas in Riichi Mahjong: The Art of the Yaku
- Riichi adds a yaku and the chance for Ura-Dora to boost hand value
- The hand must be entirely closed and consist only of sequences (shuntsu)
- Declaring Riichi locks your hand, preventing any further tile swaps
- The pair must not be dragons or the player's own/prevailing wind
- The 1,000 point bet and discard signal put defensive pressure on rivals
- The final wait must be a ryanmen (two-sided) wait on a sequence
- The strategic tradeoff of declaring Riichi
- The specific structural requirements for Pinfu
- Menzen Tsumo is a guaranteed 1-han yaku for any closed hand
- Kuitan (open Tanyao) is a common speed tactic in many rule sets
- Opening the hand by calling 'Pon' or 'Chi' loses this scoring condition
- Closed Tanyao is more valuable as it stacks with Riichi and Ippatsu
- Tanyao requires using only number tiles between 2 and 8
- A hand needs at least one yaku (scoring pattern) to declare a win
- The benefit of Menzen Tsumo for closed hands
- Many yaku, like Pinfu or Riichi, are lost the moment the hand is opened
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Riichi Mahjong: The Art of the Yaku the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
To qualify for the Pinfu yaku, what must your hand be composed of?
Get it right to open this lesson and 23 more in the app.
Where Riichi Mahjong: The Art of the Yaku takes you
Move beyond basic sets and learn to construct high-value winning hands. Master the strategic trade-offs between speed, value, and defensive flexibility.
- 1
The Core Scoring Engine
- The Power of the Closed Hand
- Speed and Efficiency with Yakuhai
- 2
Pattern Recognition and Shape
- Mastering Sequences
- The Triplet Path
- 3
Navigating the Board
- Terminal and Honor Strategies
- Situational and Luck-Based Wins
- 4
Advanced Scoring Logic
- Stacking and Dora Efficiency
- The Hidden Value of Fu
4 sections · 8 units · 24 levels. Built to play, not to enroll.
You pick the voice
Riichi Mahjong: The Art of the Yaku is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
More Sports on Tomo
Fishing for the First Time
Go from holding a rod to landing your first catch. This course covers the essential gear, casting techniques, and 'fish logic' needed for a successful day at the water.
Athletic Performance and Strategy
Master the physical mechanics, tactical intelligence, and psychological resilience required to excel in competitive sports at a professional level.
Speed Cubing: Your First Solve
Go from a scrambled mess to a solved cube. Learn the foundational moves, finger tricks, and pattern recognition used by the world's fastest cubers.
Pickleball: The Tactical Kitchen
Move beyond basic dinking and learn the high-level chess match of the non-volley zone. This course focuses on manipulating opponents, mastering the transition zone, and winning the hand battles that define advanced play.
The Life of Ace: Toronto's Blue Jay
Step into the feathers of MLB's most energetic bird to discover how Ace the Blue Jay keeps the Rogers Centre rocking. Learn the history, the silent language, and the high-stakes performance of professional mascotry.
Chess: Your First Moves
Stop guessing and start playing with purpose. Learn to control the board, win trades, and spot the tactical traps that catch every beginner.
Start Riichi Mahjong: The Art of the Yaku today.
Download Tomo, search Riichi Mahjong: The Art of the Yaku, and play your first lesson in under a minute.