In a recent opposition decision, the Japan Patent Office (JPO) dismissed an opposition claimed by Joker, Inc. against TM Reg no. 6924753 for wordmark “pingu・pongu”, finding dissimilarity to and unlikelihood of confusion with the opponent’s earlier mark “PINGU.”
[Opposition case no. 2025-900151, decided on May 22, 2026]
Contested mark
A Japanese individual filed trademark application for wordmark “pingu・pongu” in standard character for use on several services in Class 41, including educational and instruction service, arranging seminars, providing electronic publications, and amusement with the JPO on October 3, 2024 [TM App no. 2024-106222]

The JPO granted registration of the mark on May 1, 2025, and published it for a post- grant opposition on May 13, 2025.
Opposition by Joker, Inc.
Joker, Inc., an owner of the copyright and trademark rights featuring a 5-year-old boy penguin character “Pingu”, filed an opposition on July 11, 2025 and claimed cancellation of the contested mark in contravention of Article 4(1)(vii), (xi), (xv) and (xix) of the Trademark Law based on their earlier trademark registration no. 5316898 (see below).

The JPO Opposition Board decision
1. Recognition of the cited mark “PINGU”
The JPO acknowledged that the name “PINGU” (ピングー), associated with the well-known penguin character, had been used in Japan since the 1990s and had achieved a certain degree of public recognition by the early 2000s.
However, the Office found that the evidence submitted by the opponent was insufficient to demonstrate that the cited mark remained widely recognized at the time the contested mark was filed and registered. While the record showed ongoing activities such as merchandise sales, social media promotions, and events involving PINGU, no evidence was provided regarding sales figures, market share, advertising expenditures, or the current level of consumer recognition.
The JPO also noted the absence of objective evidence linking those activities directly to the opponent’s business. As a result, the Office concluded that the opponent had failed to prove that the cited mark PINGU was widely recognized among consumers in Japan or abroad as indicating the opponent’s goods or services.
2. Comparison of two marks
Although the mark contains the element “pingu,” the two components are represented in the same font, size, and spacing, and are connected by a centered do, the JPO held that the contested mark “pingu・pongu” should be viewed as a single, inseparable coined term. The pronunciations, “Pingu-Pongu,” are neither awkward nor unnatural. Since neither “pingu” nor “pongu” has a recognized meaning in ordinary dictionaries, consumers would perceive the mark as a whole as an invented term without any particular meaning.
The cited mark consisted of a penguin character design incorporating the word “PINGU,” together with the wording “PINGU’S ENGLISH.”
According to the JPO, both the figurative and verbal elements of the cited mark could independently function as source identifiers. The literal elements therefore generated pronunciations such as “Pingu,” “Pingu’s English,” but conveyed no specific meaning because the elements are coined terms.
3. No Likelihood of Confusion
Comparing the marks, the JPO found significant differences in appearance. The cited mark contains a prominent penguin device and additional wording, whereas the contested mark consists solely of the standard-character expression “pingu・pongu.”
The Office also determined that the respective pronunciations are clearly distinguishable. “Pingu-Pongu” differs substantially in both syllabic structure and overall sound from “Pingu,” and “Pingu’s English.”
As neither mark conveys a particular concept, no conceptual comparison could be made.
Considering the visual and phonetic differences as a whole, the JPO concluded that the marks are dissimilar and unlikely to be confused. Consequently, the contested mark did not fall within Article 4(1)(xi) and (xv) of the Trademark Law.


















