Seiji Maehara

Renho resigned in July 2017 after the DP suffered a bad result in the 2017 Tokyo assembly elections. A leadership election was immediately held to select the new leader of the party. Maehara was one of the candidates contesting the election, along with former Chief Cabinet Secretary Yukio Edano. Through his reliable support from conservative DP and former JIP members, Maehara comfortably won the leadership election with 60% of the points up for grabs. He returned as the leader of the largest opposition party almost 12 years after ascending to the post for the first time.

Koike's multiple blunders during the campaign led Kibō to fall well short of high initial expectations, becoming the second largest opposition party behind the Edano-led CDP. Maehara, whose political gamble had backfired, was under heavy pressure to resign from his position as DP president. Maehara resigned from his post and from the party on 28 October 2017, ending his tumultuous second term as Leader of the Opposition.

Maehara joined Kibō in November 2017. When Kibō merged with the Democratic Party in May 2018 to form the Democratic Party for the People, Maehara also joined the DPP

In 2016, the DPJ merged with Japan Innovation Party forming the Democratic Party. Maehara attempted to make a comeback at the leadership in the first leadership election post-merger, but lost against former minister Renho.

In March 2011, only four days before the March 11 earthquake and tsunami, Maehara resigned as Minister for Foreign Affairs after it emerged that he had accepted a political donation of ¥250,000 (approx. US$3,000) from a 72-year-old South Korean permanent resident of Japan who operated a restaurant in Kyoto. Maehara had known the woman since junior high school, but her foreign nationality made the donation illegal if it had been accepted intentionally. Maehara apologised to the nation for only holding the post for 6 months and for "provoking distrust" over his political funding. According to the Japan Times, the resignation would cause Japanese relations with the United States to weaken. The donation was revealed by an opposing party politician, Shoji Nishida; The Economist described the incident as a scandal based on a technicality that primarily illustrates the unsatisfactory treatment of Koreans in Japan.

Following Kan's announced resignation in August 2011, Maehara initially planned to support Finance Minister Yoshihiko Noda, but broke off this support due to disagreement over whether to raise the consumption tax, and declared his own candidacy for the presidency of the DPJ on 22 August. He lost to Noda and Economy Minister Banri Kaieda in the first round of balloting on 29 August.

Then Prime Minister Naoto Kan reshuffled the cabinet effective 17 September 2010, making Maehara the youngest Minister of Foreign Affairs in postwar Japanese history. The main international relations event during his tenure as foreign minister was the 2010 Senkaku boat collision incident, which led to increased tensions between Japan and the People's Republic of China concerning their overlapping claims to the Senkaku Islands.

In the 2009 Japanese general election, the Democratic Party won a two-thirds majority of the House of Representatives, allowing the party to form a new government.

Maehara was appointed Minister of Land, Infrastructure and Transport on 16 September 2009. In this role, he was the spokesman for a number of government initiatives, including:

Maehara was the leader of the Democratic Party of Japan (DPJ) from 2005 to 2006, and later served as Minister of Land, Infrastructure, Transport and Tourism and Minister of Foreign Affairs under the cabinets of Yukio Hatoyama and Naoto Kan, before resigning from the cabinet in March 2011 after he acknowledged receiving illegal donations from a South Korean national living in Japan. Affiliated to the openly revisionist organization Nippon Kaigi, Maehara is viewed as a "China hawk" and a proponent of close ties with the United States. He is also often viewed as being politically conservative.

After the crushing defeat of the DPJ in the 2005 snap election and the resignation of DPJ leader Katsuya Okada, the elected representatives of the party met to choose a new leader. The two candidates were Naoto Kan and Maehara. Maehara defeated the 58-year-old Kan by a razor-thin count of 96–94 in open balloting by party members from both Houses of the Diet, with two members abstaining and two others having cast invalid votes. Maehara was appointed DPJ president on 17 September 2005.

Maehara married his wife Airi (愛里) in June 1995; they have no children. He likes to take photographs of trains as a hobby.

He was elected to the House of Representatives as a member of the Japan New Party of Morihiro Hosokawa in 1993. In 1994, he left the party and formed the "Democratic Wave" with several other young parliamentarians, but later that year joined the Sakigake Party, which was briefly part of the majority government. In 1998, he joined the Democratic Party of Japan (DPJ) when it was formed that same year.

Maehara won election to the Kyoto Prefectural Assembly in 1991 with the support of, among others, future Diet member Keiro Kitagami. At the time, he was the youngest prefectural assemblyman in Kyoto history.

Maehara was born in Kyoto to parents from Tottori Prefecture. He attended the law faculty of Kyoto University, where he majored in international politics. He attended the Matsushita Institute of Government and Management from 1987 to 1991.

Seiji Maehara (前原 誠司 , Maehara Seiji, born 30 April 1962) is a Japanese politician and was the leader of the Democratic Party from 1 September 2017 until its dissolution later that month. He has also been a member of the House of Representatives of Japan since 1993.