u/ChiwaByte — reddlx

Jansou — my free browser-based riichi mahjong game (2–4 player modes, English UI)

Hi r/Mahjong! I'm a developer from Japan, and I'd like to share Jansou (雀奏), the free browser-based riichi mahjong game I'm working on. The moderators approved this introduction.

Play here: https://jan-sou.com/en

It runs in your browser without a download and has an English interface. You can play against CPU opponents in two-player, three-player, and four-player modes without signing up. Ranked play and online multiplayer require an account. There is no real-money gambling.

There are also What-to-Discard exercises, a training mode, and a 3D table. I personally enjoy the two-player mode because the action moves quickly.

Thank you to everyone who replied to my recent post asking what features you wish mahjong apps had. Your thoughts about portrait layouts, optional character-free presentation, easier access to yaku and fu explanations, and clearer English support have given me a lot to think about. I'm still considering how to incorporate that feedback into future updates.

If you give it a try, I'd love to hear what felt enjoyable or confusing, especially with the English interface or the two-player mode. Honest criticism is welcome!

Generative AI disclosure:

- Illustrations were generated with GPT Image.

- Music was generated with ACE-STEP 1.5.

- The CPU opponent's algorithm was developed with AI assistance.

- This post was translated and polished with AI assistance.

Thanks for reading!

u/ChiwaByte — 13 days ago

▲ 6 r/Mahjong

What feature do you wish more mahjong apps had?

Hi! I'm from Japan, where riichi mahjong is popular, and I'm curious about the apps people use. What's one feature you wish your current mahjong app had, or one thing you'd improve? Which ruleset do you usually play?

For me, a post-game review that explains key decisions—like tile efficiency or when it would have been safer to fold—would be useful. I'd prefer that kind of feedback after the hand rather than as live advice during play.

I'm also developing a browser-based riichi mahjong game, so I'm asking from a developer's perspective. I'm not including a link or asking people to test it; I'd like to hear what features players value.

Disclosure: This post was translated and polished with AI assistance.

reddit.com

u/ChiwaByte — 14 days ago

▲ 34 r/Mahjong

What makes you choose riichi mahjong?

I'm Japanese, and I only recently learned that the style of mahjong commonly played in Japan is known internationally as riichi mahjong. Do people play it outside Japan? If you chose riichi over other mahjong styles, what drew you to it? I'd love to hear what you enjoy about it.

Disclosure: This post was translated and polished with AI assistance.

reddit.com

u/ChiwaByte — 15 days ago