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XP does not have modern drivers. For a Japanese system, you need:

The installer will boot to a blue screen. Even if you don't read Japanese, the layout is identical to English XP:

: While modern web browsing is nearly impossible due to outdated security protocols and lack of browser support (like the latest Chrome versions), it remains a favorite for running vintage Japanese software and games that require specific regional settings.

You will need a valid Windows XP Home Edition Japanese retail or OEM key. Note that keys are often region-locked; an English key may not work on a Japanese ISO. Security Warning and Best Practices