Mahjong Fight Club — Mahjong Plaza

Q: Where can I play at home?

Official UNION press and product pages point to the **コナステ版** for Windows, Android, and iOS. Konasute play entry: https://p.eagate.573.jp/game/eacloud/p/common/title.html?game=mfc (KONAMI ID + e-amusement pass; PC play uses PASELI). See also https://www.konami.com/arcadegames/products/am_mfc_union/.

Q: Is it free?

Konasute FAQ frames play as paid per title via **PASELI** on PC (and store billing on mobile); exact table fees and campaigns change — confirm the live Konasute fee table or campaign notices (e.g. periodic play-fee discounts announced on official channels).

Category: Home games · Japanese Riichi online
Also called: 麻雀格闘倶楽部; マージャンファイトクラブ; Mahjong Fight Club UNION; 麻雀格闘倶楽部 UNION; コナステ版麻雀格闘倶楽部; MFC
Last checked: 2026-09-11

What it is

Mahjong Fight Club (麻雀格闘倶楽部) is a first-party online multiplayer Japanese Riichi (Japanese mahjong) service from 株式会社コナミアーケードゲームス (Konami Arcade Games Co., Ltd.), framed as 日本プロ麻雀連盟公認のオンライン対戦型麻雀ゲーム. The current home product line is 麻雀格闘倶楽部 UNION, playable at home via コナステ (KONAMI AMUSEMENT GAME STATION) on Windows PC, Android, and iOS — live 人対人 tables with automatic nationwide matchmaking, ranked/dan modes, and pro-player participation. 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 competitive or casual live Riichi at home on PC or mobile through Konami’s first-party Konasute client, labeled clearly as Japanese online 対戦 / 対人 mahjong rather than an NMJL-card American table or a Shanghai-style puzzle.

Why it’s listed

Plaza needs a citeable Home-games slot for Konami’s first-party home Konasute Fight Club client that is not already on disk (not Sega NET MJ, Tenhou, RonRon / 龍龍, Mahjong Soul, Riichi City, Mahjong 4 Friends, Mahjong Time, or other home-game files).

Official product page (https://www.konami.com/arcadegames/products/am_mfc_union/) loaded on 2026-09-11. Body: 「麻雀格闘倶楽部（マージャンファイトクラブ）」とは、初心者から熟練雀士まで全てのプレーヤーが楽しめる日本プロ麻雀連盟公認のオンライン対戦型麻雀ゲームです。 Spec table: プレイ人数 1人（オンライン対戦により4人でのプレーが可能）.
Official press release (https://www.konami.com/arcadegames/corporate/ja/topics/2025/1015/) dated 2025年10月15日: 株式会社コナミアーケードゲームス announces arcade and コナステ版 『麻雀格闘倶楽部 UNION』 start; genre オンライン対戦麻雀ゲーム; arcade players 1人 (オンライン対戦時は最大4人); Konasute OS list Windows®10、Windows®11、Android(5.0以降)、iOS(13.0以降). Series copy: アミューズメント施設のほか、モバイル、PCなどマルチプラットフォームで本格麻雀が楽しめます. Konasute defined as KONAMI arcade titles playable PCやスマートフォンでいつでも.
Official play guide hub (https://p.eagate.573.jp/game/mfc/playguide/index.html): オンライン対戦 / 「人」対「人」の白熱したリアルな対局; automatic level-matched matching; JPML-authorized pros join online tables. Footer copyright ©2026 Konami Arcade Games.
Online modes (https://p.eagate.573.jp/game/mfc/playguide/contents/mode.html and mode_beginner.html): beginner オンラインモード lists 全国段位別戦東風 / 全国段位別戦半荘 / 全国段位別戦三麻; beginner mode copy: 段位の近いプレーヤーと4人打ち対局（東風戦） and 4人打ち対局（半荘戦）. Grand League includes 全国東風リーグ / 全国半荘リーグ.
Official 四人打ち対局ルール (https://p.eagate.573.jp/game/mfc/playguide/contents/rule01.html): 東風戦 20,000点 / 半荘戦 25,000点スタート; 食いタン・後付けあり; 赤ドラ / 裏ドラ / カンドラ; 順位点 for seats 1位–4位. Separate 三人打ち対局ルール and 競技ルール卓 pages. Confirms real multiplayer table rules, not tile-matching.
Konasute play entry (https://p.eagate.573.jp/game/eacloud/p/common/title.html?game=mfc) and Konasute FAQ (https://p.eagate.573.jp/game/eacloud/p/common/faq.html): home play via コナステクライアント on PC/smartphone; FAQ frames Konasute as arcade titles PCやスマートフォンでいつでも楽しめる; notes 麻雀格闘倶楽部シリーズ maintenance windows and mid-table disconnect / 棄権 rules for online 対局. Play requires Japan-region KONAMI ID, e-amusement pass, and (PC) PASELI for play fees.
Company page (https://www.konami.com/corporate/kag/ja/): 商号 株式会社コナミアーケードゲームス / Konami Arcade Games Co., Ltd.; 本店 東京都中央区銀座1丁目11番1号; 本社 東京都江東区有明3丁目4番8号; 代表取締役社長 西村宜隆.

No NMJL card, Charleston, or American scoring appears on those official pages. Table play is framed as online 対戦 / 人対人 / 4人打ち against other people — not a tile-matching solitaire board.

Official URL

Product hub: https://www.konami.com/arcadegames/products/am_mfc_union/

Press (UNION launch / Konasute): https://www.konami.com/arcadegames/corporate/ja/topics/2025/1015/

Play guide: https://p.eagate.573.jp/game/mfc/playguide/index.html

Modes: https://p.eagate.573.jp/game/mfc/playguide/contents/mode.html

Beginner modes (4人打ち): https://p.eagate.573.jp/game/mfc/playguide/contents/mode_beginner.html

四人打ち対局ルール: https://p.eagate.573.jp/game/mfc/playguide/contents/rule01.html

Konasute play (MFC): https://p.eagate.573.jp/game/eacloud/p/common/title.html?game=mfc

Konasute FAQ: https://p.eagate.573.jp/game/eacloud/p/common/faq.html

Company: https://www.konami.com/corporate/kag/ja/

Location

Play is online at home via コナステ (Windows PC client / streaming, Android, iOS). Operator: 株式会社コナミアーケードゲームス / Konami Arcade Games Co., Ltd. Registered office printed on the company page: Ginza 1-11-1, Chuo-ku, Tokyo. HQ: Ariake 3-4-8, Koto-ku, Tokyo (Konami Creative Front Tokyo Bay). Related arcade cabinets and a separate mobile 麻雀格闘倶楽部Sp line exist under the same brand; this Plaza slot is the at-home Konasute UNION multiplayer product.

Notes

Japanese Riichi / Japanese mahjong only as the listed rule family. Do not blur this into American Mah Jongg or Chinese Competition Rules.
Online 対戦 multiplayer tables — official modes feature 4人打ち 東風 / 半荘 (plus 三麻) with nationwide matchmaking — not solitaire tile-matching.
Product, press, play guide, modes, 四人打ちルール, Konasute entry/FAQ, and company pages loaded on 2026-09-11.
UI is primarily Japanese; Konasute home play currently expects a Japan-region KONAMI ID. Confirm live client language and region requirements yourself.
Arcade cabinets and 麻雀格闘倶楽部Sp are related brand products; this listing is the home Konasute multiplayer service.
Not affiliated with Mahjong Plaza.

FAQ

Q: Is Mahjong Fight Club American Mah Jongg or solitaire?
A: No. Official product and play-guide pages call it a JPML-authorized オンライン対戦型麻雀ゲーム with 人対人 matchmaking and 四人打ち対局ルール. It is not an NMJL-card American product and not a tile-matching puzzle.

Q: Where can I play at home?
A: Official UNION press and product pages point to the コナステ版 for Windows, Android, and iOS. Konasute play entry: https://p.eagate.573.jp/game/eacloud/p/common/title.html?game=mfc (KONAMI ID + e-amusement pass; PC play uses PASELI). See also https://www.konami.com/arcadegames/products/am_mfc_union/.

Q: Is it free?
A: Konasute FAQ frames play as paid per title via PASELI on PC (and store billing on mobile); exact table fees and campaigns change — confirm the live Konasute fee table or campaign notices (e.g. periodic play-fee discounts announced on official channels).