Maru-Jan

Category: Home games · Japanese Riichi online
Also called: オンライン麻雀 Maru-Jan; 丸雀; Maru-Jan App; オンライン麻雀Maru-Jan
Last checked: 2026-09-14

What it is

Maru-Jan (オンライン麻雀 Maru-Jan) is a first-party online multiplayer Japanese Riichi (Japanese mahjong) service from 株式会社シグナルトーク (SignalTalk Inc.). Official hub and store copy frame it as オンライン麻雀 / オンライン対戦 — live table matches against other players on Windows PC, Mac, iOS, and Android, with ranked/event tables, dan and rating systems, and free セット卓 private rooms for friends. 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, labeled clearly as Japanese online 対戦 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 SignalTalk’s first-party Maru-Jan client that is not already on disk (not Mahjong Fight Club, Sega NET MJ, Tenhou, RonRon / 龍龍, Mahjong Soul, Riichi City, Mahjong 4 Friends, Mahjong Time, or other home-game files).

• Official hub (https://www.maru-jan.com/) loaded on 2026-09-14. Page title リアル麻雀の質感、音 オンライン麻雀 Maru-Jan[公式]; meta description: 22年の歴史を誇るオンライン麻雀ゲームMaru-Jan。Windows版はもちろんMac／iOS／Androidにも対応。リアル麻雀を徹底追求したMaru-Janをまずは無料でお試しください。 Hub frames オンライン麻雀 Maru-Jan, free registration with 対局ポイントプレゼント, and platform entry points for Windows PC, Mac, Android, and iOS.
• Mobile / cross-platform page (https://www.maru-jan.com/mobile/): title オンライン麻雀 Maru-Jan 公式サイト｜PC・タブレット・スマホで遊べる麻雀; meta: 最高級のグラフィック、高速通信対局、リアルを徹底追求したオンライン麻雀 Maru-Jan。PC/iPad/iPhone/Android対応。 Body: service since 2004, 会員数180万人を超える; サクサク打てる快適な対局; same account across PC and mobile.
• Official セット卓 guide (https://www.maru-jan.com/guide/table/set.html): create a room, share a URL with friends; choose 四麻東南 / 四麻東南割れ目 / 四麻東風 / 三麻; set オカ / ウマ; 何人でも何卓でも全員無料でプレイ可能; friends join via URL and start 対局. Confirms real multiplayer friend tables (four-player 四麻 featured), not solitaire.
• Official rules (https://www.maru-jan.com/qr/rule.html): meta description calls Maru-Jan 全国の雀士とオンライン対戦可能な究極の麻雀; common rules include 喰いタン、先付け (後付け), 赤ドラ, リーチ, and full Japanese yaku tables; separate 三麻ルール; ranking notes reference 東南戦 / 東風戦. Confirms real multiplayer table rules, not tile-matching.
• Google Play オンライン麻雀 Maru-Jan (https://play.google.com/store/apps/details?id=com.signaltalk.mji): developer SignalTalk Inc.; About copy: popular online mahjong with 1.8 million members / ~8,000 daily players; Set Table to invite friends and record scores like a home tournament; table-fee model with first-place fee return; website field points at maru-jan.com. Listing showed Updated on Jul 30, 2026 on this check. Play developer address: 5-8-7, KAMATA KAMATAK1 BLDG. 8F. OTA-KU, 東京都 144-0052 Japan.
• App Store Maru-Jan App (https://apps.apple.com/jp/app/maru-jan-app/id816142637): seller SignalTalk; same オンライン麻雀 / セット卓 / 従量課金 framing; copyright / developer SignalTalk Inc.
• First-party 特定商取引 page (https://www.maru-jan.com/policy/tokutei.html): 販売業者 株式会社シグナルトーク < SignalTalk Inc. >; 住所 〒144-0052 東京都大田区蒲田5-8-7 蒲田K-1ビル 8F; 代表者 栢 孝文; sample table fees listed as 東風 / 東南 / 三麻 point costs (confirm live rates on the site).
• Company outline (https://www.signaltalk.com/company/outline/): 社名 株式会社シグナルトーク [SignalTalk Inc.]; 所在地 same Kamata address; 沿革 lists 2004年04月26日 オンライン麻雀ゲーム「Maru-Jan」発売 and later iOS/Android home clients.

No NMJL card, Charleston, or American scoring appears on those official pages. Table play is framed as online 対戦 / 対局 / 四麻 against other people — not a tile-matching solitaire board.

Official URL

Hub: https://www.maru-jan.com/

Mobile / platforms: https://www.maru-jan.com/mobile/

Game intro: https://www.maru-jan.com/game/game.html

セット卓: https://www.maru-jan.com/guide/table/set.html

採用ルール: https://www.maru-jan.com/qr/rule.html

Google Play: https://play.google.com/store/apps/details?id=com.signaltalk.mji

App Store: https://apps.apple.com/jp/app/maru-jan-app/id816142637

Shop / legal (特定商取引): https://www.maru-jan.com/policy/tokutei.html

Company: https://www.signaltalk.com/company/outline/

Location

Play is online (Windows PC, Mac, iOS, Android; related TV clients also exist under the brand). Operator: 株式会社シグナルトーク / SignalTalk Inc. Address printed on the 特商法, Play developer, and company pages: Kamata 5-8-7, Kamata K-1 Bldg. 8F, Ota-ku, Tokyo 144-0052, Japan. Separate puzzle / training spin-offs (e.g. 麻雀脳力塾) exist under the Maru-Jan brand; this Plaza slot is the at-home online multiplayer 対局 service.

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 セット卓 features 四麻 東南 / 東風 (plus 三麻); hub and stores frame nationwide online 対局 — not solitaire tile-matching.
• Hub, mobile page, セット卓, rules, Play, App Store, 特商法, and company pages loaded on 2026-09-14.
• UI is primarily Japanese; store and web copy are Japanese-first. Confirm the live client language options yourself.
• Related solo puzzle / study apps under the Maru-Jan brand are out of scope for this Home-games slot.
• Not affiliated with Mahjong Plaza.

FAQ

Q: Is Maru-Jan American Mah Jongg or solitaire?
A: No. The official hub and stores call it オンライン麻雀 with オンライン対戦 / 対局 against other players, and セット卓 lists 四麻 East-South / East-only tables. It is not an NMJL-card American product and not a tile-matching puzzle.

Q: Where can I play?
A: Official hub https://www.maru-jan.com/ links Windows/Mac clients and mobile paths; Google Play and App Store list オンライン麻雀 Maru-Jan / Maru-Jan App (SignalTalk Inc.). Friend tables: https://www.maru-jan.com/guide/table/set.html.

Q: Is it free?
A: Hub invites free registration and trial 対局ポイント; セット卓 copy says those private tables can be played with no table fee for participants. Regular ranked/event tables use a per-table point (場代) model with first-place return described on store pages — exact free vs paid table limits change; confirm the live hub or store page.