(n) the smallest of the four main islands of Japan; to the south of Honshu and to the east of Kyushu; separated from Honshu by the Inland Sea; forested and mountainous
[ないち, naichi] (n) (1) (sens) within the borders of a country; domestic soil; (2) inland area; (3) (during the WWII era) Japan proper, as opposed to its overseas colonies; interior of country; homeland; (4) (in Hokkaido and Okinawa) the "mainland" parts of Japan (Kyushu, Shikoku, Honshu)#16236