Web apps

そとルール。

東京23区の公園で手持ち花火をしてよいか、日時と公式情報から確認するガイド。

Open app Back to works

About this work

東京23区の公園で手持ち花火をしてよいか、日時と公式情報から確認するガイド。

This studio introduction is translated; the quiz itself currently opens in Japanese.

Made for

People looking for a small, focused browser experience
Anyone curious about independent Japanese web projects
People who prefer trying an app without installing it

Highlights

Focused idea

東京23区の公園で手持ち花火をしてよいか、日時と公式情報から確認するガイド。

Open in a browser

No account or app-store installation is required to open the experience.

Designed for everyday use

A compact experience built around one clear purpose.

How to get started

01
Open the app
Use the link on this page to open the original app in a new tab.
02
Follow the in-app guide
Check the Japanese interface and any onboarding or notices shown there.
03
Return whenever you like
Bookmark the app or come back through this studio page.

How data is stored

Storage differs by work. Some settings and records may be kept only in your current browser; check the app’s own guidance before clearing site data.

Changing the display language on this studio site does not change or reset app data.

Before you use it

The quiz interface currently opens in Japanese.

For location, transport, money or health-related information, check current official information and use your own judgement.

Frequently asked questions

Is the quiz itself available in English?

Not yet. This studio introduction is translated, while the quiz currently remains in Japanese.

Do I need to install anything?

No. You can open the web app directly in a supported browser.

How long does it take?

About one minute.

Open it in your browser and start right away.