This is a study on the repair of Kumamoto Castle by Kato Tadahiro (Kumamoto Castle Lord) for twenty years from 1612 to 1632 by studying the darwing "Higo-kumamotojoTyakuzu" in the Monjokan of Yamagutiken and "Kumamoto-yasikiwari-sitaezu" in the Library of Kumamotoken, the writing "Higo-uto-gunki" in the Li- brary of Utosi and the drawing "Utojo-zu" in "Higo-uto-gunki". The results are as follows; 1. Kato Tadahiro repaired the composition of Kumamoto Castle from for easts to west for three years from June, 1612 to June, 1615. 2. Kato Tadahiro moved Utojo-Tenshu from Uto Castle and made it Kumemotojo-Kotenshu in Kumamoto Castle for three years from June, 1612 to June, 1615. 3. The cause which Kato Tadahiro was confiscated Higo-koku was because he repaired Kumamoto Castle.