Riichi City — Mahjong Plaza

Category: Home games · Japanese Riichi online
Also called: RiichiCity; 麻雀一番街; Maajan Ichibangai
Last checked: 2026-09-18

What it is

Riichi City is a first-party online 4-player Japanese Riichi (Japanese mahjong) client. You sit ranked, friendly, or tournament tables against other players, with tutorials and cosmetic / character systems — it is not American Mah Jongg, not Chinese Official / MCR as the primary product, and not solitaire tile-matching.

Who it’s for

Players who want live or ranked Riichi at home on iOS, Android, Steam, or the hub’s desktop client, labeled clearly as Japanese mahjong rather than an NMJL-card American table.

Why it’s listed

Plaza needs a citeable Home-games slot for real 4-player Riichi that is not already on disk as a file (not Mahjong Soul, Tenhou, Maru-Jan, RonRon / 龍龍, Sega NET MJ, Mahjong Fight Club, Mahjong 4 Friends, Mahjongg4Fun, NMJL Online, Mahjong Hand Helper, Mahj Parlour, Four Winds, Eight Bam, or Mahjong Royale).

Official hub (https://www.mahjong-jp.com/) loaded on 2026-09-18: title Riichi City - Japanese Mahjong; lead WELCOME TO RIICHI CITY ! / Mahjong: Your pass to the game! Download strip: App Store, Google Play (com.riichicity.happywoods), APK, Steam, and Windows/MacOS /Linux with a scan-to-download QR. Pay Center path /riichicitystore. Hub also links Discord, Facebook, and X (RiichiCity_EN).
Steam (https://store.steampowered.com/app/1954420/Riichi_City__Japanese_Mahjong/?l=english) on 2026-09-18: Riichi City - Japanese Mahjong; developer and publisher Formirai Co., Ltd.; Free to play with in-app purchases; release date printed Sep 8, 2022; features Online PvP and Cross-Platform Multiplayer. About copy: “Traditional Japanese mahjong game”; “Enjoy different modes and features without any cost!”; “Indulge in the real Riichi mahjong games with your friends anywhere, anytime!”; “Experience truly random tiles, without any additional adjustments!”; named yaku examples Chii / Pon / Kan / Pinfu / Chinitsu / Kokushi Musou. Beginner tools listed: tutorials, game log, spectator mode, winning-tile hints, draw/discard tips, auto hints, point calculation. Customer service: riichicitysupport@mahjong-jp.com. English reviews chrome that day: Mostly Positive (980); recent reviews Mixed.
App Store (https://apps.apple.com/us/app/riichicity-acg-mahjong-games/id1578816591) on 2026-09-18: RiichiCity - ACG mahjong games; seller LANCELOT TECH LTD; Free · In-App Purchases. Copy names 4-Player and 3-Player Ranked Matches, Friendly Matches, and Tournaments, plus 1-Round Challenges and Grand Prix. “Jump into classic Riichi mahjong at no cost!” with the same yaku list. Age rating 16+. Rating chrome that day: 4.6 / 607 ratings.
Google Play (https://play.google.com/store/apps/details?id=com.riichicity.happywoods&hl=en_US): developer chrome Formirai Co., Ltd.; In-app purchases. About the developer stamp: Deep Rover Digital Tech Limited; developer@mahjong-jp.com; address Rm 1911 LEE GDN ONE, 33 HYSAN AVE, 銅鑼灣, 香港島, Hong Kong; phone +852 9519 6382.

No NMJL card, Charleston, or American scoring appears on those official pages. Table play is framed as Riichi ranked / friend / tournament matches against other people — not a tile-matching solitaire board.

Official URL

Hub: https://www.mahjong-jp.com/

Steam: https://store.steampowered.com/app/1954420/Riichi_City__Japanese_Mahjong/

App Store: https://apps.apple.com/us/app/riichicity-acg-mahjong-games/id1578816591

Google Play: https://play.google.com/store/apps/details?id=com.riichicity.happywoods

Location

Play is online (iOS, Android, Steam for Windows / macOS / Linux, plus the hub’s desktop download). Steam lists Formirai Co., Ltd. as developer/publisher. Google Play developer address: Deep Rover Digital Tech Limited, Rm 1911 LEE GDN ONE, 33 Hysan Ave, Causeway Bay, Hong Kong Island. Support emails printed: riichicitysupport@mahjong-jp.com (Steam) and developer@mahjong-jp.com (Play).

Notes

Japanese Riichi / Japanese mahjong only as the listed rule family. Do not blur this into American Mah Jongg or Chinese Competition Rules.
Online multiplayer tables — App Store copy names 4-Player and 3-Player Ranked Matches, Friendly Matches, and Tournaments. Not solitaire tile-matching.
Hub, Steam, App Store, and Google Play pages loaded on 2026-09-18.
Free-to-play with in-app purchases / cosmetics. Steam marks some mature content (nudity / sexual content in the store questionnaire). Confirm live client ratings and IAP yourself.
Not affiliated with Mahjong Plaza.

FAQ

Q: Is Riichi City American Mah Jongg or solitaire?
A: No. The official hub, Steam, and App Store call it Japanese / Riichi mahjong with 4-player and 3-player ranked and friend matches against other players. It is not an NMJL-card American product and not a tile-matching puzzle.

Q: Where can I play?
A: Official hub https://www.mahjong-jp.com/ links App Store, Google Play (com.riichicity.happywoods), Steam app 1954420, an APK, and a Windows/macOS/Linux client.

Q: Is it free?
A: Steam and App Store list it as free to play with in-app purchases. Confirm live IAP and platform availability before treating a mode as free.