Steam app 1954420 · updated 13 Sep 2026, 07:26 UTC
Riichi City is a competitive urban-style Anime mahjong game, featuring beginner-friendly mahjong tutorials, Ranked Matches and tournaments crowded with masters! Spice up the experience with our ACG characters voiced by famous CVs, and attractive items and decorations! Set off for Riichi City now!
720 hourly samples, with the daily peak drawn over them. Weekends are shaded.
49 months, September 2022 to September 2026. The highest number of people in the game at once, each month, on a time axis -- a gap in the record stays a gap.
The highest number of people in the game at once, each month. Four, because four is as far back as the source keeps anything finer than one figure a month.
31 days, each one the highest figure that day. The source keeps no hourly detail this far back. Weekends are shaded.
31 days as the curve, each the highest figure that day. Behind it, 425 hourly samples from 14 Aug, which is as far back as the source keeps every hour. Weekends are shaded.
13 days as the curve, each the highest figure that day. Behind it, 295 hourly samples. Each dip is a night. Weekends are shaded.
Riichi City - Japanese Mahjong was released on Sep 8, 2022.
| Language | Full audio |
|---|---|
| English | |
| Japanese | ● |
| Traditional Chinese | |
| Simplified Chinese |
A blank audio cell means full audio was not marked in the returned language list.
50 developer announcements, May 2026 to Sep 2026 · times in UTC
There will be an update scheduled on 09/10 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update.1. New CharactersTwo new characters…
loveowner470■Name: Yoo SooeunCV (KR): Bang SiuCV (JP): Inagaki Konomi ※Exclusive Outfits is available only when you obtain corresponding characters. #RiichiCity
loveowner470■Name: Usui SuzuneCV：Inagaki Konomi ※Exclusive Outfits is available only when you obtain corresponding characters. #RiichiCity
loveowner470■Name: Choi HyorinCV (JP): Shimamura YuCV (KR): Kim Hyeon-ji ※Exclusive Outfits is available only when you obtain corresponding characters. #RiichiCity
loveowner470■Name: Yoo SooeunCV（KR）：Bang SiuCV（JP）：Inagaki Konomi"Now then... be a good patient and tell me everything."🔜 Coming Soon: Thursday, September 10th
loveowner470■Name: Choi HyorinCV (JP): Shimamura YuCV (KR): Kim Hyeon-ji"You look worried. How about a thorough checkup... from head to toe?"🔜 Coming Soon: Thursday, September 10th
loveowner470■Name: Usui SuzuneCV: Inagaki Konomi"I'm not like a vase. Even broken, I can still become whole again."🔜 Coming Soon: Thursday, September 10th
loveowner470The new decorations of new character 'Usui Suzune' will be available from Thursday, September 10th!Stay tuned!✨\◆Avatar Frame - Usui Suzune's Gift (Obtainable via Character Affection)◆Title - Memories with Usui Suzune (Obtainable via…
loveowner470Name: Usui Suzune \CV: Inagaki KonomiBirthday: September 15thHeight:141cmStyle: Grounded and pragmaticFavourite Yaku: Haitei Raoyue, Triple Red TilesThe Far Side of the MoonCaptain, can you rub my cheeks a little?🔜 Coming Soon: Update on…
loveowner470Name: Usui SuzuneCV: Inagaki KonomiBirthday: September 15thHeight:141cmStyle: Grounded and pragmaticFavourite Yaku: Haitei Raoyue, Triple Red TilesThe Far Side of the MoonUsui Suzune. Katana? No... it's my Drying Pole.🔜 Coming Soon: Update…
loveowner470The new decorations of new character 'Yoo Sooeun' will be available from Thursday, September 10th!Stay tuned!✨\◆Avatar Frame - Yoo Sooeun's Gift (Obtainable via Character Affection)◆Title - Memories with Yoo Sooeun (Obtainable via Character…
loveowner470Name: Yoo Sooeun \CV (JP): Inagaki KonomiCV (KR): Bang SiuBirthday: October 27thHeight:165cmStyle: Flamboyant and flawlessFavourite Yaku: PaarenchanFlamboyant and flawlessI'm a perfect ten today, as usual!🔜 Coming Soon: Update on Thursday…
loveowner470Name: Yoo SooeunCV (JP): Inagaki KonomiCV (KR): Bang SiuBirthday: October 27thHeight:165cmStyle: Flamboyant and flawlessFavourite Yaku: PaarenchanThe Eternal CenterI'm Yoo Sooeun from Melosea.Need I say more? Try to keep up—I'm not slowing…
loveowner470There will be an update scheduled on 08/25 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update.1. Anniv. Character AU.RO.RA…
loveowner470There will be an update scheduled on 08/11 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update. 1. Fuwa Mahiru & Inukai Hina…
loveowner470There will be an update scheduled on 07/30 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update.1. Introducing 4.5th Anniv.…
loveowner470■Name: Saionji RukiaCV : Ueda Reina
loveowner470■Name: LoreleiCV : Takahashi Minami
loveowner470■Name: ShivaniCV : Takahashi Minami
loveowner470■Name: Saionji RukiaCV : Ueda Reina"The strawberry isn't just sinking into the cream. It's melting on the tip of your tongue."🔜 Coming Soon: Thursday, July 30th
loveowner470■Name: LoreleiCV : Takahashi Minami"Sei doch leiser... It's just you and me now."🔜 Coming Soon: Thursday, July 30th
loveowner470■Name: ShivaniCV : Takahashi Minami"P-pirates don't actually have to know how to swim. R-right, Purana...?"🔜 Coming Soon: Thursday, July 30th
loveowner470Name: Saionji RukiaCV: Ueda ReinaBirthday: April 1stHeight:156cmStyle: Poetic elegance with a resilient willFavourite Yaku: Haitei Raoyue, Houtei RaoyuiLantern-Bearing PhantomAnd now, you are my whole world, human.🔜 Coming Soon: Update on…
loveowner470Name: Saionji RukiaCV: Ueda ReinaBirthday: April 1stHeight:156cmStyle: Poetic elegance with a resilient willFavourite Yaku: Haitei Raoyue, Houtei RaoyuiLantern-Bearing PhantomFlowers fade, but their fragrance lingers on.🔜 Coming Soon…
loveowner470Name: Saionji RukiaCV: Ueda ReinaBirthday: April 1stHeight:156cmStyle: Poetic elegance with a resilient willFavourite Yaku: Haitei Raoyue, Houtei RaoyuiLantern-Bearing PhantomGood day, I'm Saionji Rukia. "Familiar," you say...? Well, I did…
loveowner470There will be an update scheduled on 07/10 10:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update.1. \ Introducing the Mahjong Ronpa Collab…
ohiin222Following the maintenance on 2026/07/10 (Fri.), the much-anticipated collab event Mahjong Ronpa will be officially live! ✨Locked in a room, you face an unfinished mahjong match.What happened here? Let's collect \ and unveil the truth behind…
ohiin222#Ultimate DespairEnoshima Junko - Party Time"Come on, put in some real effort to entertain me, okay? I'm already so tired of this world."🔜 Estimated release date: 2026/07/10 (Fri.)When available, you can spend Outfit Tokens to purchase this…
ohiin222#Ultimate GamblerCelestia Ludenberg - Queen of the Sands"Hehe... As my knight, your duty is to give your utmost in serving me faithfully."🔜 Estimated release date: 2026/07/10 (Fri.)When available, you can spend Outfit Tokens to purchase…
ohiin222#Ultimate ???Kirigiri Kyoko - Tranquil Shallows"It's nice to switch things up every now and then."🔜 Estimated release date: 2026/07/10 (Fri.)When available, you can spend Outfit Tokens to purchase this outfit in the…
ohiin222#Ultimate Lucky Student#Naegi Makoto - Underwater World"Even in our most ordinary days, we can find joy in the company of others, and I couldn't be happier as long as I can live the life I want."🔜 Estimated release date: 2026/07/10…
ohiin222#Ultimate DespairEnoshima Junko (Awakened)"Hope and despair are like two sides of the same coin, inseparable yet uniquely contrasting... Where there is hope, despair inevitably follows."🔜 Estimated release date: 2026/07/10 (Fri.)You can…
ohiin222#Ultimate DespairEnoshima Junko (CV: #Toyoguchi Megumi)Birthday: 12.24Height: 169cmPlaystyle: Expert at predicting outcomes"Ta-da! It's me, Enoshima Junko, the Ultimate Despair! Hope I can have some fun in this…
ohiin222#Ultimate GamblerCelestia Ludenberg (Awakened)"I'm not very skilled at mahjong, but I once won a duel where the stakes were life or death."🔜 Estimated release date: 2026/07/10 (Fri.)You can awaken this character to obtain the corresponding…
ohiin222#Ultimate GamblerCelestia Ludenberg (CV: #Shiina Hekiru)Birthday: 11.23Height: 164cmPlaystyle: Versatile gambler"I'm Celestia Ludenberg, the Ultimate Gambler. I'll never succumb to defeat in any duel…
ohiin222#Ultimate ???Kirigiri Kyoko (Awakened)"It's your unshakable faith in me that emboldens me to explore the unknown..."🔜 Estimated release date: 2026/07/10 (Fri.)You can awaken this character to obtain the corresponding awakening…
ohiin222#Ultimate???Kirigiri Kyoko (CV: #Hikasa Yoko)Birthday: 10.06Height: 167cmPlaystyle: Calm and collected"I'm... Kirigiri Kyoko... Feel free to tag along, just try not to interfere with my…
ohiin222#Ultimate Lucky StudentNaegi Makoto (Awakened)"To be honest, I'm not that great at mahjong. But somehow, I always manage to seize the crucial moment and pull off a win. Is it my luck playing a role here...?"🔜 Estimated release date…
ohiin222#Ultimate Lucky StudentNaegi Makoto (CV: #Ogata Megumi)Birthday: 02.05Height: 160cmPlaystyle: Fighting tenaciously to the very end"I'm Naegi Makoto, a typical high schooler with no remarkable qualities to speak of. If there's really one…
ohiin222／#RiichiCity × #Danganronpa㊗ Collab Rerun Confirmed㊗＼The most despairing incident in mahjong's history is unfolding again. ⚠️Will the players overturn their fate and discover hope?Event duration: the end of maintenance on 2026/07/10 (Fri.)…
ohiin222There will be an update scheduled on 06/30 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice. ※ You can still access the game as normal during the update. 1. Riichi City × Danganronpa…
ohiin222There will be an update scheduled on 06/10 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update.1. After the update, players can tap…
ohiin222There will be an update scheduled on 05/28 from 11:00 to 17:00 (UTC+9). Please note that the duration is subject to change without prior notice.※ You can still access the game as normal during the update.1. New CharactersEvent duration: the…
ohiin222Seraphina・Languid Scent（SP）(CV: Hara Yumi )※Exclusive Outfits is available only when you obtain corresponding characters. #RiichiCity
ohiin222■Name: Mika ShuuCV: Shin Yuuki ※Exclusive Outfits is available only when you obtain corresponding characters. #RiichiCity
ohiin222■Name: KeisenCV（JP）: Igarashi HiromiCV（CN）：Xiaodi ※Exclusive Outfits is available only when you obtain corresponding characters. #RiichiCity
ohiin222What Steam runs, and with what. Straight from the app configuration.
| Description | Executable | Arguments | Platform | |
|---|---|---|---|---|
| Launch | Mahjong-JP.exe | windows | branch default | |
| Launch | riichicity.app | macos | ||
| Launch | Mahjong-JP.x86_64 | linux 64 |
It runs on public data and somebody's spare time.
https://paypal.me/KintaroPalPay[email protected]0x4d559C765AA8BFe336E36d5b76024926767eD38dTJtctWU9uetJaTBoSybd1RErW7n9duTKVG