During Edo-Era inspectors were sent throughout Japan several times. In 1838 inspectors were sent to Kumamoto-Han and used Okyaku-yas for stay and rest.
Through the examination of historical materials such as plans, following results were ascertained;
1)Plan of Okyaku-ya was similar to plan of town house and private house in Kumamoto-Han.
2)Unlike town house and private house, Ocha-ya was aided by Kumamoto-Han government.
