[Unfair Competition Prevention Act] Tokyo District Court, Reiwa 5 (Wa) 70513, the “Karate dojo” case <Judge Nakashima>

Japanese version: https://www.takaishihideki.com/single-post/linkedin-7513416207610507264-ja

Article information

Article type: Case note

Categories: Unfair competition law

Issues: Defamation

Published on website: 2026-10-08

Display and classification checked: 2026-10-08

[Unfair Competition Prevention Act] Tokyo District Court, Reiwa 5 (Wa) 70513, the “Karate dojo” case <Judge Nakashima>

Although the plaintiff's name was not stated, a person acquainted with the plaintiff, or aware that the plaintiff was the owner of the dojo in question, could identify the “dojo owner” in the post as the plaintiff when reading it in the ordinary way.

⇒ Defamation was established.

https://lnkd.in/ga7dKtCr

Original article (2025-10-16):

https://lnkd.in/garx5Y9Z

https://note.com/chosakuken/n/nb150d3957258

Originally posted on LinkedIn: https://www.linkedin.com/feed/update/urn:li:activity:7513416373658886145/

Consultation guide by purpose: https://www.takaishihideki.com/en/single-post/consultation-guide-en

Update history

The update history records only changes actually published, with dates.

2026-10-08: First publication of the LinkedIn original; display, classification, and consultation link set.