In a trademark opposition disputed between “MONSTER ENERGY” and “POCKET MONSTERS”, the Japan Patent Office (JPO) did not side with Monster Energy Company and decided in favor of Nintendo.
[Opposition case no. 2023-900162, decided on December 19, 2024]
POCKET MONSTERS
Nintendo / Creatures Inc. / Game Freak Inc., the IP owners of “Pocket Monsters”, widely known as its abbreviation, “Pokémon” as well, filed a trademark application for wordmark “POCKET MONSTRERS” in standard character for use on various categories of goods and services in classes 3, 9, 14, 16, 18, 20, 21, 24, 25, 28, 30 and 41 with the JPO on September 1, 2022 (TM App no. 2022-101055).
Pokémon, a blend of the words “Pocket Monsters”, means not only fictional creatures that inhabit the fictional Pokémon World, but also a Japanese media franchise that includes video games, animated series, films, and a trading card game.

The JPO granted protection of the applied mark without issuing any office action on April 3, 2023. Subsequently, the mark was published for post-grant opposition on May 12, 2023.
Opposition by Monster Energy
Monster Energy Company, the parent company of Monster Energy Drink, filed an opposition against “POCKET MONSTERS” with the JPO on July 10, 2023 before the lapse of a two-month statutory period counting from the publication date.
Monster Energy claimed a partial cancellation of the applied mark in relation to the designated goods of class 30 including tea, tea-based beverages, coffee, coffee beverages, cocoa based on Article 4(1)(vii) and (xv) of the Japan Trademark Law by citing its owned earlier marks that consist of “MONSTER ENERGY” or “MONSTER” in class 32.

Monster Energy alleged that the mark “MONSTER” has become famous among consumers to indicate energy drinks originating from the claimant. There was no dispute that the applied mark contains the term “MONSTER”. Therefore, relevant consumers would mistakenly associate the opposed mark with the claimant and consider a source of the beverages bearing the mark “POCKET MONSTERS” from a licensee of the claimant.
JPO decision
The JPO Opposition Board found evidence sufficient to establish a high degree of recognition of the mark “MONSTER ENERGY” to indicate energy drinks from the claimant. However, the Board questioned whether the cited marks have been widely recognized even among general consumers of carbonated beverages and juices other than energy drinks.
In addition, the Board found evidence insufficient to find a certain degree of recognition of the mar “MONSTER” per se.
Based on the above findings, the Board assessed similarity of mark by comparing overall appearance, sound and meaning between “MONSTER ENERGY” and “POCKET MONSTERS”.
From appearance and sound, the difference of words, “ENERGY” and “POCKET” has a material effect on overall visual and aural impression to the extent that relevant consumers can easily distinguish. Conceptually, the marks are unlikely to cause confusion because the opposed mark does not give rise to any specific meaning contrary to the cited marks. Therefore, the opposed mark is deemed dissimilar to the cited mark “MONSTER ENERGY”.
Given the low degree of similarity between “MONSTER ENERGY” and “POCKET MONSTERS”, the Board has no reason to believe that relevant consumers are likely to associate the opposed mark used on the goods in class 30 with Monster Energy or its licensee.
If so, the opposed mark should not be cancelled in contravention of Article 4(1)(vii) and (xv).