投稿者: Hisa

GeocorderのAPIはGoogleを使ってましたが、課金されるので、フリーなのを探してたところ見つけました。

SDKも多数あってチュートリアルも詳しいです。https://opencagedata.com/code

経緯度を渡すと、タイムゾーンも取得できます。
日本の郵便番号を渡すと、誤結果が多いので地名で渡してます。

デモページでのレスポンス
OpenCage Geocorder : https://opencagedata.com/

HTTP Status code: 200

HTTP Headers:
  Content-Type: application/json; charset=utf-8
  access-control-allow-origin: *
  X-RateLimit-Limit: 2500
  X-RateLimit-Remaining: 2499
  X-RateLimit-Reset: 1589155200

Content:
{
  "documentation": "https://opencagedata.com/api",
  "licenses": [
    {
      "name": "see attribution guide",
      "url": "https://opencagedata.com/credits"
    }
  ],
  "rate": {
    "limit": 2500,
    "remaining": 2499,
    "reset": 1589155200
  },
  "results": [
    {
      "annotations": {
        "DMS": {
          "lat": "31° 47' 33.88056'' N",
          "lng": "35° 13' 4.46736'' E"
        },
        "MGRS": "36RYA0998619605",
        "Maidenhead": "KM71ot60dg",
        "Mercator": {
          "x": 3920439.541,
          "y": 3713626.637
        },
        "OSM": {
          "edit_url": "https://www.openstreetmap.org/edit?node=2754824262#map=17/31.79274/35.21791",
          "note_url": "https://www.openstreetmap.org/note/new#map=17/31.79274/35.21791&layers=N",
          "url": "https://www.openstreetmap.org/?mlat=31.79274&mlon=35.21791#map=17/31.79274/35.21791"
        },
        "UN_M49": {
          "regions": {
            "ASIA": "142",
            "IL": "376",
            "WESTERN_ASIA": "145",
            "WORLD": "001"
          },
          "statistical_groupings": [
            "MEDC"
          ]
        },
        "callingcode": 972,
        "currency": {
          "alternate_symbols": [
            "ש״ח",
            "NIS"
          ],
          "decimal_mark": ".",
          "html_entity": "₪",
          "iso_code": "ILS",
          "iso_numeric": "376",
          "name": "Israeli New Sheqel",
          "smallest_denomination": 10,
          "subunit": "Agora",
          "subunit_to_unit": 100,
          "symbol": "₪",
          "symbol_first": 1,
          "thousands_separator": ","
        },
        "flag": "🇮🇱",
        "geohash": "sv9hc7syhtphz8kd165p",
        "qibla": 157.26,
        "roadinfo": {
          "drive_on": "right",
          "road": "דויד חזן",
          "speed_in": "km/h"
        },
        "sun": {
          "rise": {
            "apparent": 1589078820,
            "astronomical": 1589073300,
            "civil": 1589077200,
            "nautical": 1589075340
          },
          "set": {
            "apparent": 1589127900,
            "astronomical": 1589133360,
            "civil": 1589129460,
            "nautical": 1589131380
          }
        },
        "timezone": {
          "name": "Asia/Jerusalem",
          "now_in_dst": 1,
          "offset_sec": 10800,
          "offset_string": "+0300",
          "short_name": "IDT"
        },
        "what3words": {
          "words": "とつじょ・はずれて・あなぐま"
        }
      },
      "bounds": {
        "northeast": {
          "lat": 31.7928446,
          "lng": 35.2180076
        },
        "southwest": {
          "lat": 31.7926446,
          "lng": 35.2178076
        }
      },
      "components": {
        "ISO_3166-1_alpha-2": "IL",
        "ISO_3166-1_alpha-3": "ISR",
        "_category": "building",
        "_type": "building",
        "city": "エルサレム",
        "continent": "Asia",
        "country": "イスラエル",
        "country_code": "il",
        "house_number": "11",
        "neighbourhood": "קרית בעלז",
        "road": "דויד חזן",
        "state": "מחוז ירושלים",
        "suburb": "הבוכרים"
      },
      "confidence": 10,
      "formatted": "דויד חזן 11, エルサレム, イスラエル",
      "geometry": {
        "lat": 31.7927446,
        "lng": 35.2179076
      }
    }
  ],
  "status": {
    "code": 200,
    "message": "OK"
  },
  "stay_informed": {
    "blog": "https://blog.opencagedata.com",
    "twitter": "https://twitter.com/OpenCage"
  },
  "thanks": "For using an OpenCage API",
  "timestamp": {
    "created_http": "Sun, 10 May 2020 01:59:15 GMT",
    "created_unix": 1589075955
  },
  "total_results": 1
}

フリーでの制限は、1リクエスト/秒, 2500リクエスト/日 となってます。