(As of March 2022)
YAMAOKA Tatsumaru
- In-House Group: The Constitutional Democratic Party of Japan and the Independent
- Elected: Hokkaido 9th District (single-seat constituency), three times
- Born: 22 July 1979, Tokyo
- Education:
- Faculty of Economics, Keio University
- Career:
- Reporter, NHK (Japan Broadcasting Corporation)
- Secretary General, Hokkaido Youth Committee, Democratic Party of Japan
- Director, Standing Committee on Economy, Trade and Industry, House of Representatives