SETTINGS
AUDIO
Music
Volume 30%
Voice
Volume 35%
FX
Volume 35%
© 2026 雀心 - Janshin
About
雀心 — Janshin v0.16.0

雀心 - Janshin is a riichi mahjong web game built for quick, casual matches against AI and real opponents.

Designed and developed independently, blending traditional Japanese mahjong rules with a modern browser-based interface.

Janshin Team

Teruki Sato

Special Thanks

Natsu "Daijoubu Ma" Hashimoto - Tester/Voice Actor

Game Music
Shuffle
Match Settings
Rules
Aka Dora
Kuitan (Open Tanyao)
Double Ron
Nagashi Mangan
Chonbo (False Declaration Penalty)
Rankings
Points
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Yaku Reference
Hand Advice
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Room List
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Friends Notifications Personalisation My Stats Play History Achievements Change Username Change Key
Personalisation
Player Icon Title Voice Theme Nameplate Game Music
Player Icon
Title
Voice Theme
Nameplate
My Stats
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Play History
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Achievements
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Change Username
Change Key
Friends
Your ID —
Online Friends

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Notifications
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Store
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Terms of Service

Last updated: September 2026

1. About Janshin

雀心 - Janshin ("the game") is an independently developed riichi mahjong web game. By creating an account or otherwise playing, you agree to these Terms.

2. Accounts

You create a profile with a display name and password. You're responsible for keeping your password confidential — one person, one account. Don't impersonate another player or share accounts to manipulate rankings or stats.

3. Acceptable Use

Don't use the game to harass other players, cheat or exploit bugs for an unfair advantage, or attempt to disrupt the service for others.

4. Availability

Janshin is provided free of charge, as-is, with no uptime guarantee. Features — including account sign-up — may change or be removed at any time.

5. Termination

An account may be removed for violating these Terms. You can ask to have your account and its data deleted at any time — see the Privacy Policy for how.

6. Contact

Questions about these Terms can be directed to the developer, Teruki Sato, through the game's usual support channel.

Privacy Policy

Last updated: September 2026

What we store

Your display name; a salted hash of your password (never the plain text); your chosen icon, title, and voice theme; your coin balance; and your own game history and stats. No email address or other personal information is collected.

Why

Solely to run your account: logging you in and showing your own stats/history.

Cookies & local storage

The game stores a "stay logged in" token and a few display preferences in your browser's local storage. No third-party trackers or ads.

Your choices

You can ask to have your account and its data deleted at any time by contacting the developer.

Changes

This policy may be updated as the game evolves; the "Last updated" date above will change whenever it does.

Developer Settings
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