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A native of Kashiwa, Chiba and graduate of Senshu University, he was elected for the first time in 2003 as a member of the Democratic Party of Japan after an unsuccessful run in 2000. He was one of nine lawmakers to resign from the party in December 2011 over an intended consumption tax hike.
Uchiyama and his follow DPJ dissidents launched the Kizuna Party on January 4, 2012. He is the party President.
- "9 DPJ lawmakers submit resignation in protest at PM Noda's policies". The Mainichi Daily News. 2011-12-28. Archived from the original on 2011-12-28. Retrieved 2011-12-28.
- 政治家情報 〜内山 晃〜. ザ･選挙 (in Japanese). JANJAN. Archived from the original on December 3, 2007. Retrieved 2007-10-16. External link in
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