JAMSTEC is headquartered in Yokosuka and based in five other locations: 
Yokohama Institute for Earth Sciences (YES) in Yokohama.

Mutsu Institute for Oceanography (MIO) in Mutsu, Aomori.

Kochi Institute for Core Sample Research (KOCHI) in Kōchi.

Global Oceanographic Data Center (GODAC) in Nago, Okinawa.

Tokyo Office.
JAMSTEC is headquartered in Yokosuka and based in five other locations: 
Yokohama Institute for Earth Sciences (YES) in Yokohama.
Mutsu Institute for Oceanography (MIO) in Mutsu, Aomori.
Kochi Institute for Core Sample Research (KOCHI) in Kōchi.
Global Oceanographic Data Center (GODAC) in Nago, Okinawa.
Tokyo Office.
Japan Agency for Marine-Earth Science and Technology