On January 19, 2022, Riichi City was released with 8 characters to choose from.
Free characters (obtained after completing the tutorial): Isshiki Seibi, Miyake Kanna
Gacha characters (obtainable via Gacha): Toho Nagi, Kuki Renshin, Igarashi Saeko, Amami Shiotsuki, Tenmiya Kenichi, Jan Maru
Exclusive 7-Day Check-in reward from the Launch Celebration: Miyake Kanna’s Outfit - Cartoonist
On February 2, 2022, Riichi City invited the famous professional mahjong player Shibukawa Nanpa to join a No Bugs Challenge in-game. After playing for hours and checking the whole game, he declared "No bugs were found".
On February 28, 2022, Riichi City held its first Monthly Team Event in which players could team up with professional mahjong players and compete against each other. The winning team was decided according to their total scores in Ranked Matches.
On March 14, 2022, Riichi City launched the event Fight for the Shimmering Snowflake and made available two new exclusive outfits: Bunny (for Toho Nagi) and Sweet Girl (for Amami Shiotsuki).
On April 4, 2022, Riichi City held the second Monthly Team Event.
On April 14, 2022, Riichi City launched the Friendly Match function. Friendly Match supports in-game voice chat, Open Riichi, Yakitori and Shugi.
On April 28, 2022, Riichi City held the event Secret Trip and made available two new exclusive outfits: Tipsy (for Igarashi Saeko) and Secret Memory (for Kuki Renshin).
On May 13, 2022, Riichi City invited players to join testing for 3-Player Mahjong. Participants who sent feedback and reported bugs to the team in the Twitter, Discord and LINE groups were given rewards such as a special avatar frame.
On May 26, 2022, 3-Player mode went live in Riichi City.
On June 23, 2022, the Custom Tournament function was optimized. 3-Player mode, points customization, seating assignment, manager settings and various other features added.
On June 30, 2022, the Summer Live event was launched.
New Gacha characters: Saotome Yurika and Akabane Athena
New exclusive outfits: Beach Date (for Isshiki Seibi), Summer Break (for Miyake Kanna), Sound of Waves (for Saotome Yurika), Summer Undercover (for Akabane Athena).
This section needs a rewrite. KyuuAA (Talk:キュウ) 23:22, 18 January 2023 (UTC)