Mahjong game themed around the entertainment world, "Janstar," released today. Various cute female mahjong players, including a lively childhood friend and a tsundere older sister, make their appearance.
Note: the original Japanese article can be found at:
https://www.4gamer.net/games/953/G095367/20251015044/
Editorial Department: Akasaka | 2025/10/15 09:21 (UTC)
USERJOY Technology today (October 15, 2025) released its new smartphone app “Janshū (JANSTAR)” (iOS / Android), along with a mature-themed PC version available on Steam.
This game is a mahjong title centered around the entertainment world. The protagonist, unexpectedly thrust into showbiz while still in drag due to an accident, sets out on a journey toward stardom alongside beautiful young female players in a city where mahjong is absolute power.
The game features multiple modes such as competitive “Rank Match” and casual “Leisure Match”, supporting both four-player and three-player mahjong.
A promotional video introducing the various cute female mahjong players appearing in the game—including an energetic childhood friend and a tsundere older sister—has also been released. Check it out if you’re interested!
Official Website for “Janshū (JANSTAR)”
Download Page for “Janshū (JANSTAR)”
Download Page for “Janshū (JANSTAR)”
Mahjong × Entertainment!? A brand-new, fresh mahjong game featuring cute girls
“Janshū (JANSTAR)” is now globally released simultaneously!
Sign up today and get 200 free gacha pulls!
USERJOY Technology CO., LTD. announced today (the 15th) the global simultaneous release of its latest title, “Janshū (JANSTAR),” in Taiwan, Japan, and Europe & America. The game is available on multiple platforms including App Store, Google Play, and Steam, allowing players to enjoy mahjong matches anytime, anywhere, on their preferred device. Centered around the innovative theme of “Mahjong × Entertainment,” “Janshū (JANSTAR)” delivers a fresh experience unlike any traditional mahjong game. New players can now receive 200 free gacha pulls—don’t miss out!
[Immersive Story – A Glittering Path to Stardom]
In the city of “Shin-Tō,” there lies a special autonomous district—“The Number One Prosperous Street.” This is a bustling hub for all forms of entertainment, where people gather day and night in search of fun. Game centers, anime cafes, restaurants, amusement parks—all thrive here. As night falls, vibrant lights from clubs and cabarets illuminate the streets with dazzling energy. However, this city has one special rule: “Violence is forbidden; disputes are settled through mahjong. The outcome carries absolute power—breaking it results in capital punishment.”
The story’s protagonist (player) unexpectedly enters the entertainment world dressed in drag after an audition for a TV drama. From there begins an unexpected new chapter of life.
The main storyline unfolds in a futuristic world blending “Entertainment × Mahjong.” As the protagonist, you will aim for the top through your mahjong skills, racing across the entertainment scene with beautiful young female players to become the brightest star!
[Popular Voice Actors Featured – Unlock Special Stories with High Affection]
Adorable younger sister type, energetic childhood friend, slightly tsundere older sister—numerous charming female mahjong players appear in the game. Over ten characters are featured, voiced by renowned voice actors such as Furin Misuzu, Natsumi Kana, Mitakarin, Aoi Tokio, Hagiya Ren, and Ao no Musubi. Experience top-tier audio enjoyment.
Players can gift presents to their favorite mahjong players to deepen bonds. As affection increases, exclusive lavish costumes and special intimate storylines unlock, allowing you to enjoy sweet private moments together—perhaps even a little more thrilling experience?
[Authentic Riichi Mahjong – Thrilling Match Experience]
In “Janshū,” you can enjoy mahjong anytime, anywhere—free from restrictions of number of players, time, or location. Compete in the “Rank Match” against strong opponents or relax with the casual “Leisure Match.” The game supports both four-player and three-player modes. Matches connect quickly, often within seconds. You can even invite friends to play together!
New mahjong players, don’t worry! The game includes a detailed tutorial that explains rules and scoring from basics to advanced techniques—anyone can learn mahjong easily. During gameplay, helpful features like operation guides for “Chi,” “Pon,” “Kan,” “Ron,” and display of remaining tiles are available so you can stay aware of the situation and play comfortably.
[Full Customization – Show Off Your Unique Style]
One of the game’s major highlights is its rich original music and extensive customization features. Players can freely change lobby BGM, match BGM, and Riichi BGM to create their ideal gameplay environment. Additionally, you can customize various elements such as winning animations, calling effects, Riichi sticks, hand decorations, tile designs, and tablecloths—expressing your unique style visually and aurally while competing with top players.
[Take a Break Between Mahjong Matches – Play Cute Girl Slots]
In the world of “Janshū,” you can enjoy fun beyond mahjong. Players can challenge cute girl slot machines at the “Game Center.” Simply choose your bet amount and spin the reels! Win rewards when symbols align, and trigger the “FREE GAME mode” by matching three SCATTERs. Experience thrilling suspense and exhilarating wins!
[Get 200 Free Gachas Now – Receive a Limited Riichi Stick by Joining Official Discord]
To celebrate the release of “Janshū (JANSTAR),” we’re offering exclusive rewards for new players. Simply logging in grants you 200 free gacha pulls! Additionally, joining our official Discord will reward you with a limited item: “Riichi Stick: Three-Color Dumpling.” Our official Discord regularly hosts events and offers opportunities to interact with other players and enjoy matches. Don’t miss this chance—join us now!
“Janshū (JANSTAR)” is a fresh, innovative mahjong game featuring a futuristic world view and striking visuals. Centered around the unique theme of “Mahjong × Entertainment,” it offers entertainment for both beginners and advanced players alike. Now is your moment to step onto the stage of “Janshū (JANSTAR)"—aim high and become the top star with your mahjong skills.
Stay updated on the latest news about “Janshū (JANSTAR)” via our official Facebook page and Discord server. Be sure to follow and join in for real-time updates!