Very small

Ryotu Ko🇯🇵

Japan38.08°N · 138.57°E

Data: NGA World Port Index (2019) · not a substitute for current nautical charts.

📍 Ryotu Ko 38.08°N · 138.57°E

Chart · NGA WPI

Size & capacity

Port size

Very small

Max vessel size

Large vessels

Mean tidal range

1 m

Depths (WPI class · approx)

Channel

~13–17 m

Anchorage

~6 m

Cargo pier

~42–46 m

Oil terminal

~35–38 m

This is a WPI depth class, not a precise sounding — use current nautical charts for maneuvering.

Entrance conditions:Heavy swell

Ports