Average GPS coordinates for Otowa Postcode location: 35.283, 136.181. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Otowa on map:

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Listing cities & postcodes (3):
>> Shigaken, 520-1131 Otowa, Takashimaguntakashimachou, GPS coordinates: 35.3018,136.0015
>> Shigaken, 529-0403 Otowa, Ikagunkinomotochou, GPS coordinates: 35.5427,136.2545
>> Shigaken, 529-1626 Otowa, Gamougunhinochou, GPS coordinates: 35.0037,136.288