Japan is represented by one centralized federal government.
In the Meiji period, the Empire of Japan adopted a Western-modeled constitution and pursued a program of industrialization and modernization
 Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering 377,975 square kilometers (145,937 sq mi); the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa

