【Important cultural property】
After conquering Kyushu region, Toyotomi Hideyoshi issued this letter to Tachibana Muneshige for granting the ownership of four districts (Yamato, Mizuma, Shimotsuma and Miike) in the Chikugo Province. This proves that Muneshige improved his position from a vassal of the Ohtomo clan to a feudal lord. He then moved from the Tachibanayama-jo Castle in the Chikuzen Province to the Yanagawa-jo Castle in the Chikugo Province.