Yamaguchi was one of the principle towns in Mouri-Han and the capital of Mouri-Han shifted from Hagi to Yamaguchi in 1863. Through the examination of historical mateials, following results are ascertained; (1)Before 1863 there were 2 Ocha-yas and 2 Hon-jins in Yamguchi. There was difference between them in location, user, and so on. (2)Especially Yamaguchi Ocha-ya shared governmental function with Kanba(local government office) nearby. (3)After 1863 Okyaku-ya, which had governmental function in Hagi, was newly built and Kanba removed near Okyaku-ya.
