{"postcode_type":"office","jis":"11105","old":"330","new":"3309719","prefecture_kana":null,"city_kana":null,"suburb_kana":null,"prefecture":"埼玉県","city":"さいたま市中央区","suburb":"新都心","street_address":"１番地１さいたま新都心合同庁舎１号館","office":"関東信越国税局","office_kana":"カントウシンエツコクゼイキヨク","office_roman":"Kantoushinetsukokuzeikiyoku","post_type":"office","is_separated_suburb":null,"is_koaza":null,"is_chome":null,"is_include_area":null,"status":null,"reason":null,"prefecture_roman":null,"city_roman":null,"suburb_roman":null,"handling_post_office":"さいたま新都心","multiple_numbers":"none","created_at":"2026-10-30T08:15:02.000Z","updated_at":"2026-10-30T08:15:02.000Z","url":"https://postcode.teraren.com/postcodes/3309719.json","location":null}