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Zenkaku Normalization Engine

Convert Western data formats to Japanese administrative requirements

ASCII → Full-width (全角)

Japanese government forms require full-width characters. Type in English and see the full-width conversion instantly.

ＳＭＩＴＨ　ＪＯＨＮ

When to use full-width?

  • Name fields on residency forms (転入届)
  • Address fields on any government form
  • Phone numbers on some ward forms
  • Basically any text field that says 全角 (zenkaku)