On November 17, 2025, the Japan IP High Court handed down a ruling to disaffirm the JPO Invalidation Board’s decision regarding similarity between COSME MUSEUM in Class 35 for retail services for cosmetics and Cosmetic Museum in Class 3 for cosmetics.
[Court case no. Reiwa6(Gyo-ke)10104, decided on November 17, 2025]
COSME MUSEUM
The contested mark, consisting of the word “COSME MUSEUM” in a plain letter, was filed with the JPO on February 24, 2023. It designates various services classified in class 35, including retail or wholesale services for cosmetics (TM App no. 2023-18992).

The applicant owns the domain “cosme-museum.com” and uses the contested mark on the domain’s web pages.
The JPO examiner granted registration of the contested mark on August 9, 2023, without issuing a notice of refusal. Upon payment of the statutory registration fee, the mark was registered on October 19, 2023 [TM Reg no. 6746429].
Cosmetic Museum
MOMOTANIJUNTENKAN Co., Ltd. filed a trademark application for the wordmark “Cosmetic Museum” in standard character with the JPO on February 16, 2023 (8 days prior to the contested mark) for use on breath freshening preparations, deodorants for animals, soaps and detergents, dentifrices, bath preparations, not for medical purposes, perfumes and flavor materials, incense, false nails, false eyelashes, and cosmetics in class 3 (TM App no. 2023-16082) to secure online use of the mark in connection with cosmetics on its websites under the domain “cosmeticmuseum.jp”.
The JPO registered the earlier mark on July 13, 2023 (3 months prior to the contested mark) [TM Reg no. 6717335].
On March 28, 2024, five months after the registration of the contested mark, MOMOTANIJUNTENKAN filed an invalidation petition with the JPO requesting that the contested mark be retroactively annulled based on Article 4(1)(xi) of the Japan Trademark Law.
Article 4(1)(xi) is a provision that prohibits the registration of a junior mark that is deemed identical with, or similar to, any earlier registered mark.
JPO decision
The JPO Invalidation Board found the contested mark “COSME MUSEUM” is dissimilar to the cited mark “Cosme Museum” by stating that:
Firstly, comparing the appearance of the contested mark and the cited mark, there are visual distinctions in the presence or absence of the term “tic”, and the upper-case letters or lower-case letters consisting of the respective mark. Therefore, the Board has a reason to believe that two marks are clearly distinguishable, and unlikely to cause confusion in appearance.
Secondly, the pronunciation of the contested mark and that of the cited mark clearly differ in the presence or absence of a “tic” sound in the middle, and are clearly audible.
Thirdly, the two marks do not convey any particular meaning at all. In this regard, they remain conceptually neutral.
Based on the foregoing, the contested mark and the cited mark are unlikely to cause confusion due to a low degree of similarity in appearance and pronunciation. Taking a global view of the impression, memory, and association that the relevant consumers will perceive from the appearance, sound and concept of the marks, the Board has a reason to believe that the contested mark “COSME MUSEUM” should be found dissimilar to the earlier mark “Cosmetic Museum” and unlikely to cause confusion.”
On December 12, 2024, MOMOTANIJUNTENKAN filed a lawsuit with the IP High Court, claiming that the court should annul the contested decision because the JPO erroneously applied Article 4(xi) of the Japan Trademark Law and thus found “COSME MUSEUM” and “Cosmetic Museum” similar.
IP High Court ruling
The court noted that the term “COSME” is defined as an abbreviation for cosmetics in Japanese dictionaries and is widely used in the industry to refer to cosmetics. Thus, relevant consumers would associate the term with cosmetics, and the contested mark will convey the meaning of a museum for cosmetics as a whole.
Although the term “COSME” is recognized as an abbreviation for “cosmetics” or “cosmetic”, there is insufficient evidence to demonstrate that the terms have been used in trade practice to indicate different sources without causing confusion. Bearing this in mind, the court found that the two marks do not differ significantly in appearance.
Similarly, the court observed that the aural difference between “COSME” and “cosmetic” would be negligible.
Since both marks have the same meaning, it is reasonable to believe that relevant consumers may confuse the source of the contested mark with the earlier mark when used in connection with retail services for cosmetics.
Based on the foregoing, the court declared the annulment of the contested decision because the JPO errored in applying Article 4(1)(xi) and finding the relevant facts.















