Nintendo Cracks Down on Piracy and Emulation Tactics Revealed by Legal Expert

Nintendo's aggressive stance against emulation is well-documented. Recent legal actions highlight this, including the $2.4 million settlement with Yuzu emulator developers in March 2024, the October 2024 cessation of Ryujinx development following Nintendo's intervention, and the 2023 advice against a full Steam release for the Dolphin emulator due to Nintendo's legal pressure. The 2023 case against Gary Bowser, who resold devices enabling Nintendo Switch piracy, resulted in a $14.5 million judgment.

A Nintendo patent lawyer, Koji Nishiura, recently shed light on the company's strategy at Tokyo eSports Festa 2025. While emulators aren't inherently illegal, Nishiura clarified that their use can become illegal under specific circumstances. Copying game programs within an emulator or disabling console security measures constitutes copyright infringement, primarily under Japan's Unfair Competition Prevention Act (UCPA). The UCPA's limited jurisdiction, however, hinders Nintendo's ability to pursue legal action internationally.

The Nintendo DS "R4" card, which bypassed anti-piracy measures, served as a case study. A successful lawsuit against R4 manufacturers and resellers, based on UCPA violations, resulted in the R4's 2009 ban in Japan. Nishiura also emphasized that tools facilitating pirated software downloads within emulators, such as the 3DS's "Freeshop" or the Switch's "Tinfoil," also infringe on copyright law.

Nintendo's lawsuit against Yuzu cited one million pirated copies of The Legend of Zelda: Tears of the Kingdom, alleging that Yuzu's Patreon generated $30,000 monthly from providing subscribers with early access and exclusive features. This underscores Nintendo's focus on financial losses stemming from emulation and piracy.