RiichiMahjong.com — Mahjong Plaza

Category: Home games · Browser Japanese Riichi multiplayer
Also called: riichimahjong.com; Riichi Mahjong online; RiichiMahjong Play vs AI
Last checked: 2026-10-02

What it is

RiichiMahjong.com is a free, first-party browser game for real Japanese Riichi Mahjong: online matchmaking, private rooms, and play vs AI, plus an interactive Learn tutorial and a graded Trainer (daily discard challenge and drills). It is social table software with yaku/riichi/dora rules — not mahjong-solitaire tile matching, and not an American NMJL client.

Who it’s for

Home players who want a no-signup browser Riichi table (live opponents, private room, or AI), without using American browser/mobile clients already on disk (OpenMahj, American Mahjong app, I Love Mahj, Mahjongg4Fun, Mahjong 4 Friends, Playboard, HeyMahjong, Table Mahjong) or other Chinese/Riichi servers already listed (PlayMahjong.io, Mahjong Soul, Tenhou, Riichi City, Mahjong Spot, Mahjong.place).

Why it’s listed

The plaza needs an unused multiplayer home-game slot with a real first-party URL and clear Riichi positioning — rule-family diversity vs Monday’s OpenMahj (American browser), Tuesday’s Mahjong Spot (Taiwanese 16 / Hong Kong 13), Wednesday’s American Mahjong (iPhone/Android American private tables), and Thursday’s Table Mahjong (browser Hong Kong/Cantonese).

Homepage (https://riichimahjong.com/) returned 200 on 2026-10-02 under “Play Riichi Mahjong Free Online | RiichiMahjong.com.” Lead: “Real Riichi Mahjong. Zero friction.” Modes named on-page: Online Match, Private Room, Play vs AI. Instant play with automatic guest profile (progress in browser); no registration wall; no gacha/event clutter; interactive tutorials and yaku breakdowns; live play worldwide or invite friends.
About block on the same page: Riichi as Japanese competitive form with riichi declaration, yaku requirement, and dora; four players, 136 tiles; shape four sets and a pair from a 13-tile hand; closed ready hand can declare riichi for 1,000 points / ura dora shot.
Learn (https://riichimahjong.com/learn) returned 200 — interactive beginner tutorial (15 steps from “What is mahjong, really?” onward) with Next/Back navigation.
Rules (https://riichimahjong.com/rules) returned 200 under “Riichi Mahjong Rules.” House rules section: private rooms let the host pick a rule set; quick match and AI use Standard. Game length East-only or East+South; starting points 25,000 with 30,000 return line; placement bonuses +15/+5/−5/−15 (Competitive +30/+10/−10/−30). Rule sets Standard, Competitive, Classic documented (red fives, open tanyao, abortive draws, simultaneous ron, extension, busting, yakuman, furiten, kan after riichi, etc.).
Trainer (https://riichimahjong.com/trainer) returned 200 — daily discard challenge plus tile efficiency, wait reading, scoring, and defense drills, free and graded by the game engine.

Features and matchmaking can change. Confirm a private room works for your group before game night. Official listing URL is riichimahjong.com.

Official URL

Home / play: https://riichimahjong.com/

Learn: https://riichimahjong.com/learn

Rules: https://riichimahjong.com/rules

Trainer: https://riichimahjong.com/trainer

Location

Online (browser). No physical storefront claimed on the pages checked.

Notes

Home games / Riichi multiplayer: four-player Japanese rules with online match, private rooms, and AI — not solitaire and not American NMJL.
First-party riichimahjong.com. Distinct from plaza local-group Riichi clubs (DC Riichi, Arizona Riichi, Kansas City Riichi, Riichi NoCo, Southeast Michigan Riichi) and from Mahjong Soul / Tenhou / Riichi City servers already on disk.
Not affiliated with Mahjong Plaza.

FAQ

Q: Can I play Riichi Mahjong free in a browser on riichimahjong.com?
A: Yes. On 2026-10-02 the homepage advertised free instant play with Online Match, Private Room, and Play vs AI, with no registration wall and no download.

Q: Is this American Mahjong or Riichi?
A: Riichi (Japanese). The About and Rules pages describe yaku, riichi declaration, dora, and a 136-tile four-player table — not NMJL card hands.

Q: Are there teaching tools?
A: Yes. The Learn page is an interactive beginner tutorial, and the Trainer page offers graded drills including a daily discard challenge.