🀄 Riichi Centrepiece 🀄

- A round/honba tracker to aid during play -

📝 About 📝

A centrepiece in Riichi is a tool that helps track the current round and seat winds, they are found on a lot of online websites and real-life tables:

Example of a centrepiece on the Tenhou client.

Riichi Centrepiece is a web app that tracks:

• The round wind
• The seat winds
• The honba

Intended to be placed in the middle of the table during a game of Riichi Mahjong.

It is written as a single-page and single-file web app with no external dependencies. Just a browser and JavaScript!

🌐 Use online 🌐

You can head over to the Github Pages site and start using the app.

Once opened it has no dependency on a stable internet connection to keep working.

🚫🌐 Use offline 🌐🚫

The app is contained within a single html file. Download the file from the master branch or from the releases tab and run it inside your preferred web browser.

🕹️ Controls 🕹️

The primary controls are simple. In the middle of the screen you will see the wind, round number and honba count.

In Japanese this will look something like

東1局
0本場

In English it will look something like

E1
0H

Click on the text at the top to increment the round. Click on the text at the bottom to increment the honba/repeat count.

Extra options are given below:

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☀☼ - Setting Dark Mode

Click the ☼ icon to set dark mode. Click on the ☀ icon to set light mode. These will always be in the top left.

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34 - Setting/unsetting Sanma (3-player)

Click on the 34 icon to toggle whether you are playing Sanma (3-player Mahjong) or regular Mahjong (4-player).

The selected option should be highlighted in green.

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東半一 / THI - Setting game length (Tonppusen, Hanchan, Iichan)

Click on the 東半一 icon (or, if you are using English, THI) to set the game length. You can pick Tonpuusen (1 wind), Hanchan (2 winds) or Iichan (4 winds).

For beginners, the most common way to play Mahjong is Hanchan. Iichan is rarely played, but included for completeness.

The selected option should be highlighted in green.

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Aあ - Setting language

The Aあ icon toggles the language between Japanese and English.

English is currently fully supported, but is not the default when you boot up the app.

Some environments may not be able to render Japanese fonts.

The order of font priority is: "Hiragino Mincho", "AoyagiKouzanFont2OTF", "EPSON >太行書体Ｂ", "Times New Roman", serif. If your fallback serif font doesn't display Japanese, then you will need to install one that does.

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👷 Supports 👷

Game types

Supported	Match type	Winds	Rounds/Wind
✅	Iichan (Full-length)	4	4
✅	Iichan (Full-length) sanma	3	3
✅	Hanchan	2	4
✅	Hanchan sanma	2	3
✅	Tonpuusen	1	4
✅	Tonpuusen sanma	2	3

Languages

Language	Support
Japanese	Full ✅
English	Full ✅