Osumi-Yagura (“tower in the corner”) was one of 8 watch towers in the castle and was located on the highest ground, 45 meters above sea level, at the northwestern corner of the main enclosure. It was also used as an armory.
In celebration of the centenary of the city of Akita and with hope for continued development of the city into the next century, it was restored as a historic symbol of Senshu Park. The first two floors are based on the archival records and the results of excavation. The third floor was added as an observation floor, which gives views on the entire city.
July 12, 1989, Akita City
In this building, you can find:
-Yoshinobu Satake (1570– 1633), first lord of Kubota domain who reigned for 31 years
-Yoshitaka Satake (1609–1671), second lord of Kubota domain who reigned for 38 years
–Yoshizumi Satake (1637–1703), third lord of Kubota domain who reigned for 31 years
-Yoshitada Satake (1694–1715), fourth lord of Kubota domain who reigned for 12 years
-Yoshimine Satake (1690–1749), fifth lord of Kubota domain who reigned for 34 years
-Yoshimasa Satake (1732–1753), sixth lord of Kubota domain who reigned for four years
-Yoshiharu Satake (1723–1758), seventh lord of Kubota domain who reigned for five years
-Yoshiatsu Satake (1748–1785), eighth lord of Kubota domain who reigned for 27 years
-Yoshimasa Satake (1775–1815), ninth lord of Kubota domain who reigned for 30 years
-Yoshihiro Satakae (1812–1846), tenth lord of Kubota domain who reigned for 31 years
-Yoshichika Satake (1839–1857), eleventh lord of Kubota domain who reigned for 11 years
-Yoshitaka Satake (1825–1884), twelfth lord of Kubota domain who reigned for 14 years
-A Distinguished Family in the Line of Seiwa-Genji
-From Hitachi to Akita
-Map of Kubota Castle’s Main Building (Hon-maru) in 1859
-Plan of Kubota Castle in 1847
-Branch Castles and Outposts during the First Decades of the Kubota Domain
-Structure of Kubota Castle and Its Dimensions
-The Castle Town
-Route to Edo
-Purpose of the Alternate Residence System (Sankin-Kotai)
-Development of Mines
-Development of New Rice Fields
-Akita Cedar
-Dewa-koku-Akita-kyojo-ezu – Construction Plan of Kubota Castle in 1780