Where: Japan · Asia · approx. 36.31, 140.59 (vicinity only)
Why this spot: Rockhounding locality: agate, chert and black manganese-tinted agate on Pacific cobble beaches near Tokyo
What turns up: agate, black agate, chert, quartz, jasper
Access: Clean.
Picking loose beach pebbles in personal amounts is broadly tolerated on these public beaches; no digging near the shrine precincts
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.