Observed arrival · 2026-10-14

maosun-dev, a one-person workshop for games and tools

maosun-dev.com Visit website

Editorial interest 73/100 Selection signal · not a rating of the site

A Japanese creator’s portfolio of browser games, apps, a rhythm-game charting tool, music, and blog posts.

Landing page captured for the 2026-10-14 issue.

For: TJA chart makers and indie-game players
Worth noticing: The TJA tool can generate charts automatically and is explicitly labeled an unofficial fan-made tool.

Field notes

The creator describes the TJA tool as a way to listen to a song while tapping out a chart, with automatic generation also available. It is labeled an unofficial fan-made tool for use with games such as Taiko-san Jiro. A linked article dated 2026-10-13 walks through the process; the homepage marks the mahjong game’s App Store release as still in preparation.

Observed signals

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Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

◎NicheUnusually specific use

◉HumanPersonal, local, civic, or handmade

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