Home games · Four-style online mahjong
Amatsuki Mahjong
Also called 天月麻雀; Amatsuki Mahjong; Cyber Alice Amatsuki
Online. Official site plus Steam and mobile stores. Steam names developer and publisher Cyber Alice Limited. No street address on the pages checked.
Category: Home games · Four-style online mahjong
Also called: 天月麻雀; Amatsuki Mahjong; Cyber Alice Amatsuki
Last checked: 2026-09-22
What it is
Amatsuki Mahjong (天月麻雀) is a free-to-play online mahjong client from Cyber Alice Limited. Steam describes a real-time multiplayer game with four styles — Taiwan, Hong Kong, Japanese (Riichi), and Sichuan — in an anime (ACG) style. It is a home client, not an American NMJL card table and not a city parlor.
Who it’s for
Players who want one official client for those four table styles, including friend and casual rooms as Steam describes them, rather than a solitaire tile-matcher or a U.S. JCC drop-in.
Why it’s listed
Plaza needs a citeable first-party four-style client that is not already on disk (not Mahjong Soul, Riichi City, Maru-Jan, Tenhou, Sega NET MJ, or iTaiwan Mahjong).
- Official English site (https://www.amatsukimahjong.com/en/) loaded on 2026-09-22. The notice list included 09/22 Maintenance Completed Announcement dated 2026-09-22, and a maintenance announcement dated 2026-09-18. Footer on that page: the game is free to play and also sells virtual game coins and items; it is intended for players aged 18 and above; it does not offer real-money gambling; in-game currency, items, and characters are virtual and cannot be exchanged for cash.
- Steam store page (https://store.steampowered.com/app/3132860/_Amatsuki_Mahjong/) the same day: title 天月麻雀 (Amatsuki Mahjong); Developer and Publisher Cyber Alice Limited; Release Date and Early Access Release Date Jan 19, 2025; tags include Free To Play and Early Access. Feature copy: “a free online Mahjong game featuring Taiwan, Hong Kong, Japanese (Riichi), and Sichuan Mahjong,” with voice actors from Taiwan, Hong Kong, and Japan. Steam’s short description says it “offers real-time multiplayer online matches” and “four styles of mahjong: Japanese, Sichuan, Taiwanese, and Hong Kong Mahjong.”
Store copy and the maintenance stamp above are what those pages showed on the check date. Early Access status and notices can change.
Official URL
English site: https://www.amatsukimahjong.com/en/
Chinese site: https://www.amatsukimahjong.com/
Steam: https://store.steampowered.com/app/3132860/_Amatsuki_Mahjong/
Location
Online. Play is through the official site and the Steam build (app id 3132860). Steam names Cyber Alice Limited as developer and publisher. No street address was printed on the official English page or the Steam page checked.
Notes
- Home-game client for four table styles (Taiwan, Hong Kong, Japanese Riichi, Sichuan). Do not list it as American Mah Jongg (NMJL card) or as solitaire tile-matching.
- Official footer says it is not real-money gambling.
- Not affiliated with Mahjong Plaza.
FAQ
Q: Is Amatsuki Mahjong a 4-player table game?
A: Yes, as an online client. Steam describes real-time multiplayer in Taiwan, Hong Kong, Japanese Riichi, and Sichuan rules. It is not a one-player tile-matching puzzle.
Q: Who publishes it?
A: The Steam page checked on 2026-09-22 names Cyber Alice Limited as both developer and publisher. Release date printed there: January 19, 2025 (Early Access).
Q: Is it free?
A: The official site footer and the Steam page both describe it as free to play. The official footer also says paid virtual coins and items exist, and that those virtual assets cannot be cashed out.