{"postcode_type":"area","jis":"20452","old":"39975","new":"3997503","prefecture_kana":"ナガノケン","city_kana":"ヒガシチクマグンチクホクムラ","suburb_kana":"オオサワシンデン","prefecture":"長野県","city":"東筑摩郡筑北村","suburb":"大沢新田","street_address":null,"office":null,"office_kana":null,"office_roman":null,"post_type":null,"is_separated_suburb":0,"is_koaza":0,"is_chome":0,"is_include_area":0,"status":0,"reason":0,"prefecture_roman":"Naganoken","city_roman":"Higashichikumagunchikuhokumura","suburb_roman":"Oosawashinden","handling_post_office":null,"multiple_numbers":null,"created_at":"2026-03-04T02:04:26.000Z","updated_at":"2026-03-04T02:04:26.000Z","url":"https://postcode.teraren.com/postcodes/3997503.json","location":{"latitude":"36.385488","longitude":"138.054962"}}