Dampei Shioda graduated from Tokyo Higher Commercial School (1903) and then studied at Post-graduate Department of the same school.
Dampei Shioda served as mayor of Numadate Town (1913-1946). He was elected twice to Akita Prefectural Assembly (from 1919) and then twice to House of Representatives (from 1924). Appointed auditor of Ugo Railway Company (1932). Elected to House of Peers (1939). President of Ugo Bank (since 1943) and Numadate Shuzo Kaisha (Numadate Brewing Company) (since 1935). Served also as executive of Akita Shintaku Kaisha (Akita Trust Company) and Masuda Hydroelectric Company and a few other companies.