Yamaguchi prefecture (山口県 Yamaguchi-ken) is an area of Japan located in the Chugoku region; it is the westernmost prefecture of Honshu island. Its population was 1,483,000 in 2006.[1]
Yamaguchi prefecture shares its name with its own capital city, Yamaguchi (山口市 Yamaguchi-shi).
Yamaguchi often experiences extreme weather conditions; in August 2009, for example, severe flooding due to heavy rain led to fatal landslides and mudslides.