Otaru: Dream Beach, Zenibako

Where: Japan · Asia · approx. 43.15, 141.14 (vicinity only)

Why this spot: Ishikari Bay strand between Otaru, boom port of the Meiji herring and coal trades, and Sapporo; a century of bottle glass works ashore

What turns up: sea glass (brown, aqua, rare purple and green), ceramic-glazed glass, shells

Access: Open / legal.

Public bathing beach (Zenibako 3-chome); collecting drift glass is normal, report any suspected old ordnance to police rather than touching it

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.