Where: Japan · Asia · approx. 37.02, 137.73 (vicinity only)
Why this spot: Rockhounding locality: jade and ophiolite-suite cobbles on a dramatic cliff-foot shingle coast
What turns up: jadeite (rare), nephrite, serpentinite, quartz, jasper
Access: Open / legal.
Beach collecting of loose stones tolerated and promoted for personal amounts; note 2025 rules ended collecting in Itoigawa rivers, so stay on the marine beach
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.