|Minister of Land, Infrastructure, Transport and Tourism|
17 September 2010 – 14 January 2011
|Prime Minister||Naoto Kan|
|Preceded by||Seiji Maehara|
|Succeeded by||Akihiro Ohata|
|Member of the House of Representatives|
|Assumed office |
5 February 2019
|Preceded by||Shinji Tarutoko|
9 November 2003 – 28 September 2017
|Preceded by||Masahiro Morioka|
|Succeeded by||Shigeki Kobayashi|
|Born||23 August 1960|
|Alma mater||Yokohama National University|
Early life and education
Until 2000, Mabuchi worked in private sector and became director of the firm he was working for at age 32. He was elected to the House of Representatives for the first time in 2003 after an unsuccessful run in 2000. He was appointed senior vice minister of land, infrastructure, transport and tourism in September 2009.
On 17 September 2010, Mabuchi was named as the new minister of land, infrastructure, transport and tourism in the reshuffled Naoto Kan cabinet. Mabuchi left prime minister Kan's cabinet on 14 January 2011, after the then-opposition Liberal Democratic Party (LDP) passed a censure motion against him following the leaking of Japanese Coast Guard footage of the 2010 Senkaku boat collision incident. and ran unsuccessfully to replace him in the DPJ presidential election after Kan stepped down, losing to Yoshihiko Noda, who replaced Kan as Prime Minister. After the Democratic Party of Japan suffered a major defeat to the LDP under Noda at 2012 Japanese general election. Noda resigned to accept responsibility for the defeat.
Mabuchi continued to hold his seat until he was narrowly defeated in the 2017 general election. He had the highest ratio of margin of defeat (sekihairitsu) (97.27%) among all defeated candidates in the election. Mabuchi returned to the House in February 2019 after the resignation of Shinji Tarutoko, who was contesting the Osaka 12th district by-election. Being the candidate with the next largest sekihairitsu in Kibō no Tō's 2017 Kinki proportional representation list, Mabuchi was next in line to fill Tarutoko's PR seat. Mabuchi chose to sit as an independent.
- "Sumio Mabuchi". DPJ. Retrieved 27 January 2013.
- "Sumio Mabuchi CV" (PDF). Japan Transport. Retrieved 27 January 2013.
- Tsuzaka, Naoki (23 August 2011). "'Lone gorilla' draws support from junior lawmakers". The Asahi Shimbun. Archived from the original on 20 October 2012. Retrieved 27 January 2013.
- Johnston, Eric, "Contenders' backgrounds", Japan Times, 28 August 2011, p. 2.
- "Kan replaces over half of his Cabinet". Kyodo News. 17 September 2010. Retrieved 17 September 2010.
- "Japan PM adds new faces to cabinet in reshuffle". Agence France-Presse. 14 January 2011. Retrieved 14 January 2011.
- Mainichi Shimbun PM Noda to quit as DPJ chief after electoral disaster 17 December 2012
- Daily Yomiuri Kaieda elected new DPJ leader 26 December 2012
- Japan Times Kaieda takes DPJ helm; Ozawa overture hinted 26 December 2012
- 小選挙区開票速報：奈良県（定数3） (in Japanese). Asahi Shimbun. Retrieved 21 February 2019.
- "比例区開票速報：近畿ブロック（定数28）" (in Japanese). Asahi Shimbun. Retrieved 21 February 2019.
- "比例東海・近畿 青山氏と馬淵氏、繰り上げ当選に）" (in Japanese). Mainichi Shimbun. 5 February 2019. Retrieved 21 February 2019.
- Reuters Japan can't reject nuclear power out of hand: lawmaker 5 July 2011
| Minister of Land, Infrastructure, Transport and Tourism
| Minister of State for Okinawa and Northern Territories Affairs
| Senior Vice Minister of Land, Infrastructure, Transport and Tourism
Served alongside: Kiyomi Tsujimoto→Taizō Mikazuki
|House of Representatives of Japan|
| Representative for Nara 1st district
(seat vacated by Shinji Tarutoko)
| Representative for Kinki proportional representation block
Media related to Sumio Mabuchi at Wikimedia Commons