First-Class Health Officer

Particles and Waves

In-app purchases

About this app

A Japanese-language study app for Japan's First-Class Health Officer (第一種衛生管理者) national exam.

Please note: the interface, the questions and every explanation are in Japanese. Japanese reading ability is required.

■ What it is
300 original practice questions written to the published exam scope and format. Questions based on law are checked against e-Gov, the Japanese government's official legislation database (reflecting the April 2026 amendments).

■ Pass or fail is decided by your weakest subject
The exam requires at least 40% in every subject and 60% overall, so a single weak subject fails you. The app scores you by subject against those same thresholds and names the subject you are short on.

■ An explanation for all five choices
Every one of the five choices carries its own explanation, not just the correct one, so you learn why a choice is wrong rather than memorising the answer.

■ The statute behind each legal question
Questions based on law show the underlying article from e-Gov, so you can verify the explanation against the law itself.

■ Mock exams in the real format
Five subjects. A half mock exam of 22 questions and a full mock of 44 questions matching the real exam structure, with a subject-by-subject pass breakdown.

■ Offline and private
Android 8.0 or later. Questions are bundled in the app, so you can study without a connection. The app goes online only to receive question corrections and to process a purchase. There is no account to create, and your study record stays on the device.

■ What is free
10 drill questions in total, one half mock exam, and 3 days of the auto-play review mode. The free allowance does not reset daily. A single in-app purchase unlocks the rest. It is not a subscription, and there are no ads. See the In-app purchases line on this page for the current amount.

■ Sources and relationship to government bodies
・e-Gov law search (Digital Agency) https://laws.e-gov.go.jp/
・Ministry of Health, Labour and Welfare https://www.mhlw.go.jp/
・Japan Exam Association for Safety and Health https://www.exam.or.jp/

This is an unofficial study app made by Particles and Waves. It is not affiliated with, endorsed by, or representative of the Ministry of Health, Labour and Welfare, the Japan Exam Association for Safety and Health, or any other government or examining body, and it does not guarantee a pass. Always confirm application procedures, dates and eligibility on the examining body's official site.

Questions are original work written by Particles and Waves. They are not reproductions of past exam papers.

Last verified: 2026-09-11 (question counts, free allowance and requirements checked against the shipping app).

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「友達に教える」を追加し、学習画面と無料枠の表示・保存を整えました。