Master Mahjong Chinitsu — sharpen your reads on the full flush.

A serious training app dedicated entirely to Chinitsu (the full flush). With around 30,000 problems, a 60-second mode, a hand builder, and a review system, hone your judgment for reads and waits.

■ For mahjong players who want to master Chinitsu (full flush)
A serious mahjong training app focused exclusively on Chinitsu.
Its unique format asks "what to discard" and "what's the wait" at the same time, so you can efficiently build both speed and accuracy in reading flush hands.
Work through roughly 30,000 Chinitsu problems, drill with the review and hand-builder features, and raise your reading judgment.

▼ Recommended for
・Players who struggle with Chinitsu discards and waits
・Players who want faster, more accurate flush reads
・Intermediate players aiming for an advanced level
・Anyone who wants Chinitsu judgment that holds up in real games

▼ Main features
【Beginner Training】
A starter mode beginning with basic Chinitsu shapes. For players who want to get comfortable with Chinitsu while reviewing the fundamentals.

【Challenge Mode (discard + wait)】
A unique format where you answer the discard and the waiting tiles at once. It trains your judgment with a thought process close to real play. Choose Beginner, Intermediate, Advanced, or
Random difficulty.

【60-Second Speed Training】
A reflex mode: how many problems can you solve in 60 seconds? Aim for S, SS, and SSS ranks and sharpen your reading speed.

【Iishanten Training】
You draw one random tile onto a one-away-from-tenpai hand. Are you tenpai? What do you discard? What's the wait? Train yourself to judge it all accurately.

【Weakness Drill Mode】
Pick the shapes that trip you up (using three of a tile, four of a tile, eight or more tile types, and more) for focused practice. Reinforce exactly your weak spots.

【Hand Builder Mode】
A free mode where you build your own Chinitsu hands and check the discard and the wait. Try out any shape that's been on your mind.

【Self-Analysis】
Visualize your discard accuracy, wait accuracy, and weak shapes from the data of the problems you've solved. See your growth in numbers.

【Review】
Problems you get wrong are automatically added to your review list, so you can steadily clear your weak points.

▼ A large volume of around 30,000 problems
Around 30,000 problems covering a wide range of levels. You'll keep meeting fresh problems no matter how much you play.

▼ One-time purchase, no surprises
Premium features come at a one-time price. No monthly fees and no extra charges, ever.
Buy once and use every feature permanently.

【Free features】
・Beginner Training (with ads)
・Challenge Mode (with ads)
・60-Second Speed Training (partial)
・Iishanten Training (partial)
・Hand Builder Mode (create only; cannot add to review list)
・Review (up to 5 problems)

【Premium features (one-time purchase)】
・Unlimited 60-Second Speed Training
・Unlimited Iishanten Training
・Add hands to the review list in Hand Builder Mode
・Unlimited use of the Review feature
・Weakness Drill Mode
・Detailed Self-Analysis
・Save favorite problems
・Ad-free

▼ Aim to become a Chinitsu master
Chinitsu is said to be one of the hardest hands to read in all of mahjong.
Use this app to sharpen your discard and wait judgment, and become a Chinitsu master who can close it out for sure in real games.