Where: Japan · Asia · approx. 37.03, 137.85 (vicinity only)
Why this spot: Rockhounding locality: jadeite in serpentinite melange (beach/river float)
What turns up: jadeite, nephrite, rodingite, quartz
Access: Gray area.
Beach collecting tolerated; the Kotaki River jadeite outcrops are a protected natural monument (off-limits).
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.