China had protested what it called "close-in reconnaissance" of Chinese territory by the U.S. military in the past.

Tokyo’s Chiyoda Ward has reproduced a rare map from 1947 that shows how the postwar U.S. occupation of Japan had dominated and sprawled across the places locals walk past every day. It proved to ...

A research institute has released a 3-D geological map showing the underground structure of Tokyo's 23 wards designed to help residents think about weak areas and better prepare for earthquakes.