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Mahjong Demon

Mahjong Demon

Japanese Mahjong

85 ratings
70 reviews
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$1.99

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Details

Released
July 6, 2009
Updated
July 30, 2026

Features

Developer

NUTRACTOR
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About

Experience the strategic depth of Japanese Mahjong with this digital adaptation. Learn to form winning hands, manage discards, and understand the nuances of "Chi," "Pon," and "Kan" to achieve victory. Master the game's unique scoring and hand requirements.

✓Japanese Mahjong rules
✓Tile selection slider
✓Discard functionality
✓Forming Melds and Pairs
✓Understanding "Chi," "Pon," and "Kan"
✓Reach mechanic for scoring
✓Lost Hand rules
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What's New in Mahjong Demon

6.16

July 30, 2026

- Update the audio engine.

User reviews

Most RecentHighest RatedLowest Rated

オモロ

麻雀強くなりたいと思いながら^_^麻雀鬼功プレイしていて、とても楽しい感謝してますよ。バージョンアップしたら即購入しますよ。
ババラトッシー

favorite riichi app

This checks all the boxes for me: it’s portrait orientation; everything is easily legible; play against bots that make reasonably smart moves; option to get hints for discards; shows waits, explains points in detail, etc.; doesn’t have goofy gacha/anime/furries (sorry Kemono) aesthetics.

Some of the UI could be polished, sure, but this one easily blows the others out of the water. My only wish is that other mahjong variants like HKOS, MCR, etc. were available; I’d pay SO much for that!
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Ffashionisto_burrito

CPUイカサマ鬼巧

CPUのCPUによるCPUの為の麻雀、まるでこちらがCPUに接待麻雀してる気になる素晴らしいアプリです。
色色々面倒臭い

誤動作

捨て牌で起こる
SOSEIKIN official

鬼ほど巧みではない

シンプルな麻雀があまり無いので重宝しているが、CPUが点棒も順位も考えずにアガりに行って局を消費するのでやってられないと思うことはある
ままるもち
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FAQ

What is Mahjong Demon?

Mahjong Demon is a digital game that allows you to play Mahjong according to Japanese rules. It features a slider for tile selection and discarding, and guides you through forming winning hands and understanding the game's scoring mechanics.

What are the key mechanics in Japanese Mahjong?

Key mechanics include forming four Melds and one Pair to win. The game also incorporates specific rules for "Chi" (taking a discard to complete a sequence), "Pon" (taking a discard to complete a set of three), and "Kan" (taking a discard to complete a set of four). Understanding these and the "Reach" mechanic is crucial for scoring.

Is Mahjong Demon free to play?

Yes, Mahjong Demon is a free application. It does not feature in-app purchases or advertisements, allowing for an uninterrupted gameplay experience.

What are the rules regarding "Lost Hand"?

A "Lost Hand" occurs when you are waiting for a tile to win, but you have already discarded a winning tile yourself. While you cannot win from another player's discard in this state, you can still win by drawing the tile yourself (self-draw).

How do I win in Mahjong Demon?

To win, you must form a valid hand, which typically consists of four Melds and one Pair. You can achieve this by drawing tiles and discarding strategically. The game also requires at least one "hand" (a scoring combination) to win, and you can declare "Reach" to increase your potential score, but this cannot be done if you have called "Chi," "Pon," or "Open Kan."