Japan's legislation requires Apple to relax iOS browser restrictions, non-WebKit engines are expected to be available on iPhones
Apple's long-standing policy requiring iOS browsers to use only its WebKit engine may change under Japan's impending Mobile App Competition Law. This new regulation, expected to be fully implemented by the end of 2025, means that third-party browsers used on the iOS platform in Japan will be able to use different engines, such as Blink (used by Chrome, Microsoft Edge, and Opera) or Gecko (used by Firefox). Following the EU trend, Japan's adoption of stricter standards is similar to the direction of the EU's Digital Markets Act (DMA) implemented last year, which already requires Apple to allow third-party browsers to use its own engine in the European market. However, the new Japanese regulations are considered stricter, not only prohibiting designated platforms from preventing developers from using other browser engines, but also explicitly prohibiting Apple from imposing unreasonable technical restrictions on non-WebKit browsers. The non-profit organization Open Web Advocacy points out that this will ensure that third-party browsers have truly viable development space in the Japanese market, avoiding mere nominal openness. Scope of Impact and Actual Changes: According to the regulations, Apple is required not only to allow browsers designed with the non-WebKit engine to be listed on the App Store, but also to provide a default browser selection interface in the initial iPhone setup process, allowing users to directly choose other browsers as defaults besides Safari. This change will not only affect standalone browser applications, but also in-app browsers, such as the built-in web browsing functions of social media and shopping platforms. Developers will be free to use third-party browser engines such as Blink or Gecko, and import more complete features, performance optimizations, and a consistent cross-platform experience. Industry and User Reactions: Apple has not yet responded to how the Japanese regulations will affect its iOS ecosystem. However, the industry expects this to open up new opportunities for third-party browser vendors such as Google, Mozilla, and Microsoft, allowing them to provide full functionality on the iOS platform consistent with Android and desktop versions, rather than being limited to a simplified version under the WebKit architecture. For users, this could bring faster JavaScript execution speeds, better webpage compatibility, and more advanced features (such as extension support). At the same time, increased market competition is also expected to drive continuous improvement of the Safari browser.









