The Japan Patent Office (JPO) sided with SONY in a trademark invalidation action against TM Reg no. 6162062 for word mark “SONIMARK” in classes 35 and 42 by finding a likelihood of confusion with famous mark “SONY”.
[Invalidation case no. 2024-890041, decided on January 27, 2025]
SONIMART
The contested mark, consisting of word “SONIMART” and its transliteration written in Japanese katakana character arranged in two lines (see below), was filed by Sonic Line Co., Ltd. for use on various services including retail service and providing computer programs on data networks in classes 35 and 42 with the JPO on June 14, 2018.

The JPO examiner did not find similarity to and a likelihood of confusion with famous brand “SONY” and granted registration of the mark on July 12, 2019.
Invalidation action by SONY
SONY, one of the most recognized Japanese brands globally, filed an application for declaration of invalidity with the JPO on July 11, 2024, just before the lapse of five years counting from its registration date.
SONY claimed that the contested mark shall be invalidated in contravention of Article 4(1)(xi) and (xv) of the Japan Trademark Law by citing its owned earlier trademark registrations for the mark “SONY”.
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.
Article 4(1)(xv) is a provision to prohibit any mark from registering if it is likely to cause confusion with other business entities’ well-known goods or services.
SONY argued that relevant consumers of the services in question are likely to find the contested mark consists of “SONI” and “MART”. Since the term ‘MART’ is less distinctive in relation to the services in question, the element ‘SONI’, which is visually and phonetically confusingly similar to ‘SONY’, would play a dominant role in indicating the source of the services covered by the contested mark.
JPO decision
The JPO Invalidation Board did not question the high degree of reputation and popularity of the mark “SONY” in relation to telecommunications and electronic machines and apparatus, and consumer games.
Comparing the contested mark and the cited mark “SONY”, although the marks differ in their overall structure, both marks contain the same initial three letters, “SON” and the same pronunciation. Moreover, the term “SONI” and its sound are likely to be associated with the cited mark “SONY”, which is well known and famous in the fields of telecommunications and electronic machines and apparatus, and consumer games.
Bearing in mind that SONY has plenty of group companies and stores using a name consisting of “SONY” and descriptive word, such as Sony shop, Sony music entertainment, Sony bank, Sony city, the Board has a reason to believe that there is a certain degree of similarity between the contested mark and the cited mark.
Consumers of the services in question, in particular retail services for smart phone cases, rental of computers, and providing computer programs on data networks, are overlapping with those of telecommunications and electronic machines and apparatus. In this respect, these are closely related.
Based on the foregoing, the Board decided to invalidate the contested mark in contravention of Article 4(1)(xv) because the relevant consumers are likely to confuse a source of the services in question with SONY or an entity that is systematically or economically connected to the claimant.