| 1926 (Showa 1) | Name of era was changed to Showa. |
| 1935 (Showa10) | Crude oil gushed out from the Omonogawa oil well.Yabase oil well began to come very active. |
| 1941 (Showa16) | The Pacific War broke out. |
| 1945 (Showa20) | Port of Tutizaki in Akita was attacked(August 14) and The war ended. |
| 1946 (Showa21) | Norvember 3, The Constitution of Japan came into force. |
| 1947 (Showa22) | First time a prefectures governor was elected by people. |
| 1955 (Showa30) | First time in Japan the experiment of rocket lifting was succeeded. |
| 1957 (Showa32) | Akita's prefecture office building was burned out which was built in 1880. |
| 1969 (Showa36) | The 16th Kokutai (National physical education) was open in Akita city. |
| 1977 (Showa44) | The reclamation work of Hachirogata was completed, and new village Ohgata was born. |
| 1981 (Showa56) | New Akita Air Port was opened. |
| 1983 (Showa58) | The earthquake hit Nihonkaichubu(central part of Sea of Japan side) 83 were died or missing. |