TERMS OF SERVICE
Terms of Use
Kessen / Established November 16, 2026 / Last updated November 16, 2026
These terms govern your use of the iPhone app “Kessen” (the “App”) provided by Ryo Tsuzukihashi (independent developer / TsuzuKit, the “Developer”). By using the App, you agree to these terms.
Article 1 (Scope)
These terms apply to everyone who uses the App (“Users”). The App is distributed through the App Store, and Apple's Standard License Agreement (EULA) also applies. If these terms and the EULA conflict, these terms prevail.
Article 2 (About the App)
- The App is for practicing wiring diagrams (how wires connect, their colors, and how they are joined) for the candidate problems of Japan's Type 2 Electrician practical exam
- The App is not affiliated with the Electrical Technician Examination Center and is not official material
- The diagrams were redrawn by the Developer from the 2026 candidate problems (No.1–13) published by the Center. The work conditions are for practice; in the exam, the conditions on your question sheet take precedence. Problems and conditions are in Japanese
- There is no account sign-up or login. The App is for iPhone only
Article 3 (Price)
- The App is a paid app purchased once on the App Store. The price shown on the App Store is authoritative
- There are no in-app purchases, subscriptions, or ads. No additional payment is ever requested after purchase
- With the same Apple Account, you can download the App again on a new device or after reinstalling without paying again
- Refunds follow Apple's policy. Please request one through Apple Support (reportaproblem.apple.com). The Developer can't issue refunds directly
Article 4 (Accuracy of model answers and checking)
- The Developer verifies every model answer with separate code (for example, checking that every switch combination lights things as required) and against published answer examples. Mistakes may still remain
- If you find a mistake, please report it from “Report a Problem Error” in the App's Settings. It will be checked and fixed in an update
- The App checks only what a wiring diagram can show (miswiring, fixture polarity, wire colors, cable core counts, joint methods, ring sleeve choice, and crimp marks). Physical work such as lengths, stripping, and tightening isn't checked
Article 5 (Prohibited conduct)
When using the App, you must not:
- Violate laws or public order and morals
- Copy, republish, distribute, or sell the App's questions or explanations without the Developer's permission
- Decompile, analyze, or modify the App
- Obtain or distribute the App by any means other than official channels
- Do anything else the Developer deems inappropriate
Article 6 (Intellectual property)
Rights to the App's screens, diagrams, model-answer explanations, artwork, and name belong to the Developer. The candidate problems themselves were published by the Electrical Technician Examination Center.
Article 7 (Data)
Study records are stored on your device and in your own iCloud; the Developer holds no copy. If they are lost through device failure or loss, deleting the App, iCloud settings, or similar, the Developer can't restore them.
Article 8 (Disclaimer)
- The App is provided as is. The Developer does not guarantee that it is free of errors, always available, or fit for any particular purpose
- The App does not promise that you will pass the practical exam
- Except in cases of the Developer's intent or gross negligence, the Developer is not liable for damages arising from using or being unable to use the App. Where liable, liability is limited to the amount you paid for the App
Article 9 (Changes and termination)
The Developer may change the App or end its provision. When these terms change, this page will be updated along with the date above.
Article 10 (Governing law and jurisdiction)
These terms are governed by the laws of Japan. The court with jurisdiction over the Developer's address has exclusive agreed jurisdiction in the first instance over disputes concerning the App.
Contact
ryo.tsuzukihashi@tsuzukit.com