Japan has enacted a law to promote competition in smartphone app stores by restricting tech giants Apple and Google from limiting third-party companies from selling and operating apps on their platforms. The law aims to prevent anticompetitive practices and will impose penalties of up to 30% of domestic revenue for non-compliance. This move is seen as a significant step towards promoting fair competition in the app market. The law will prohibit providers of iOS and Android from preventing the sale of apps and services that directly compete with their native platforms' own.