（No.1）確定申告書等作成コーナーAP
This app is the macOS edition of Japan's National Tax Agency (Kokuzeicho) tax return filing tool. It guides Japanese taxpayers through the annual income tax return (確定申告) process, helping them calculate taxable income, deductions, credits and liability according to Japanese tax law. The app is primarily used by self-employed workers, freelancers and other individuals who must file returns directly with the tax agency rather than through an employer. It is distributed freely by the Japanese government as the official digital filing channel.
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1 suggestionWe could not find public information about whether a native Apple Silicon build of this tax filing app exists. Because this is Japanese government software with limited English-language documentation, your best next step is to visit the National Tax Agency's official site directly (nta.go.jp) or contact their support to confirm whether the macOS version supports Apple Silicon. Given that Apple is removing Rosetta 2 in macOS 28 (September 2028), it is worth checking this well before the deadline — especially if you file taxes annually using this tool, as an Intel-only build will stop working on that release. If the government has not released a native build by that time and you rely on this app, you may need to use a web-based filing option if available, or switch to a third-party tax preparation app that runs natively on your Mac.
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