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.
Teruki Sato
Natsu "Daijoubu Ma" Hashimoto - Tester/Voice Actor
—
Loading…
Player Icons
Nameplates
Last updated: September 2026
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.
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.
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.
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.
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.
Questions about these Terms can be directed to the developer, Teruki Sato, through the game's usual support channel.
Last updated: September 2026
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.
Solely to run your account: logging you in and showing your own stats/history.
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.
You can ask to have your account and its data deleted at any time by contacting the developer.
This policy may be updated as the game evolves; the "Last updated" date above will change whenever it does.
Your progress in this match will be lost.