Where: Japan · Asia · approx. 34.67, 138.94 (vicinity only)
Why this spot: Edo coastal-shipping port, then Perry's first opened port under the 1854 Treaty of Kanagawa; eclipsed when Yokohama opened 1859
What turns up: sea glass, shell, worn pottery shards on pocket beaches
Access: Gray area.
Public harbor front and park shore, surface look and sea glass lane only; digging is not sanctioned anywhere and buried relics must be reported under the Cultural Properties Protection Law
Open in Mudlark Map →
Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.
Pins are approximate by design. This page is historical research, not permission to dig. Check ownership and local law first.