Source: Japan Post district postcodesA subset of Japan Post's district postcode data covering Kisarazu, Sodegaura, Kimitsu and Futtsu in Chiba Prefecture. Records contain seven-digit postcodes, city and district names, and their kana readings. Business-specific postcodes are excluded.
Business-specific codes are excluded. District names and addresses retain their Japanese spelling for use on mail and maps.
Data updated: 2026-08-31