Postal Code 306-0304 in Koshu, Goka Machi, Sashima Gun
Verified postal code reference for 306-0304 in Koshu, Japan. Includes locality context, administrative hierarchy, and approximate centroid coordinates for validation and integration workflows.
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Geographic & Administrative Context
The postal identifier 306-0304 is under the regional jurisdiction of Japan. Within this territory, it is specifically managed as part of the ibaraki-ken » sashima-gun » goka-machi » koshu administrative chain, ensuring precise logistical and geographic synchronization with official geocoded registries.