Yuriko Koike

On 31 May 2017, in advance of the upcoming local elections, Koike resigned from the Liberal Democratic Party and officially became the leader of Tomin First no Kai (Tokyoites First). Koike founded the group in 2016 in preparation for the elections and formed an alliance with Komeito in an effort to secure a governing majority in Tokyo's parliament. On July 3, 2017, the alliance took a majority in the prefectural election, pushing out the Liberal Democratic Party with a combined 79 seats of the 127-seat assembly.

In 2017, Koike launched and led a new national political party. It was called Kibō no Tō, which means "Party of Hope". Although still Governor of Tokyo, she was the primary leader of this party. It was assumed that this party could have been the main opposition to the LDP. On October 22, 2017, the Party of Hope did not perform as well at the polls as expected. Koike's overarching policies were similar to those of current Prime Minister Shinzo Abe. The policy to set them apart was their differing opinions on nuclear energy. Koike was opposed to it as an advocate of the environment. Koike did not join any successor party to the Party of Hope at its April 2018 dissolution.

After Masuzoe announced his resignation in June 2016, Koike announced her intention to run in the election for his successor. Koike stated that she would run "as an LDP lawmaker" but did not obtain the approval of the Tokyo LDP chapter before announcing her candidacy. The LDP officially endorsed Hiroya Masuda, and its Tokyo chapter issued a notice that any members supporting Koike would be punished. Nonetheless, several prominent LDP politicians continued to back Koike, while senior leaders such as Shinzo Abe refrained from making speeches in support of either candidate.

Koike was elected Governor of Tokyo on 31 July 2016, becoming the first woman in the post.

On August 21, 2016, at the 2016 Summer Olympics closing ceremony, Koike received the Olympic Flag, via Thomas Bach, from the mayor of Rio de Janeiro, Eduardo Paes.

Koike has also actively promoted Japanese pop culture, appearing in cosplay as Sally from Sally the Witch in 2015, and stating during her 2016 Tokyo gubernatorial campaign that she wanted to turn all of Tokyo into an "anime land".

Following the resignation of Tokyo governor Naoki Inose in December 2013, Koike was widely rumored to be a potential candidate for the gubernatorial election expected to be held in February 2014, along with Hideo Higashikokubaru, Hakubun Shimomura, Seiko Hashimoto and Yōichi Masuzoe. She ultimately did not run, and Masuzoe won.

On 8 September 2008, she launched her bid to become president of the LDP and became the first woman ever to seek the premiership in Japan's history: "I have received the enthusiastic support of my colleagues. In order to break through the deadlock facing Japanese society, I believe the country might as well have a female candidate. Hillary used the word 'glass ceiling' ... but in Japan, it isn't glass, it's an iron plate. I'm not Mrs. Thatcher, but what is needed is a strategy that advances a cause with conviction, clear policies and sympathy with the people." In the leadership election, held on 22 September, Tarō Asō won with 351 of the 527 votes; Koike placed third with 46 votes.

She has supported the United States and the War on Terror and opposes the Japanese government's tradition of UN-centered foreign policy. However, she has sent mixed messages to the United States in terms of destabilizing the Middle East with democratization efforts. On the other hand, showing parts of the world how powerful the United States is as an ally is a priority. During the 2008 LDP leadership election, she pledged to make Russia return the four disputed islands to Japan if she was elected as prime minister. Overall, Koike is a diplomatic leader. Back in 2010, she helped strengthen ties between Libya's Muammar Quaddafi and Japan. This led to the creation of the Japan-Libya Friendship Association.

She was appointed the first female Minister of Defense in June 2007 during the first term of Prime Minister Shinzo Abe, but announced in August 2007 that she intended to resign from the post, citing the Aegis classified information leak scandal as a reason. Koike later hinted that the much-publicized fight she had had with Chief Cabinet Secretary Yasuhisa Shiozaki over a vice-minister replacement was the real reason, as the opposition would use that to oppose a bill on Japan's terrorism laws.

She was a member of the Diet members' group to promote Yasukuni Shrine visits, led by Yoshinobu Shimamura, and goes to pay her respects to the war dead at the shrine on War-End Day, 15 August, almost every year. Not being able to visit in 2007 due to an official trip to Okinawa, she sent her proxy.

She served as the Minister of the Environment and Minister of State for Okinawa and Northern Territories Affairs in the Cabinet of Prime Minister Jun'ichirō Koizumi. Along with Satsuki Katayama and Makiko Fujino, Koike became known as one of Koizumi's "assassins" in the 2005 Lower House election, running in Tokyo against an LDP hardliner candidate who opposed Koizumi's policies.

Having learned an environmental way of life from her own experience of wartime austerities in Egypt, Koike addresses environmental issues. She expressed the idea of introducing a carbon tax in 2005 so that Japan might achieve the goals of the Kyoto Protocol. The next year, she inaugurated the "Mottainai Furoshiki" campaign, which urges shoppers to use furoshiki in place of plastic shopping bags. She is against the use of biofuels made from food crops.

Koike was elected to the House of Councillors in 1992 as a member of the Japan New Party. She was then elected to the House of Representatives in 1993, representing the Hyogo 2nd district. In 1996, she was re-elected to the House of Representatives, this time representing the Hyogo 6th district for the New Frontier Party. She held this seat in the 2000 election as a candidate of the New Conservative Party. She joined the Liberal Democratic Party in 2002. She also has been a regular contributor to Project Syndicate since 2010.

Born and raised in Ashiya, Hyōgo, a wealthy, small, city near Kobe, Koike went to Kōnan Girls' Junior and Senior High School for her secondary education. Her father, Yūjirō Koike, was a foreign trade merchant who handled oil products. He was also involved in politics, supporting Shintarō Ishihara and the Tatenokai in the 1960s, and ran unsuccessfully for national election in 1969. Yūjirō emphasised to Yuriko that it was essential for Japan to strengthen relations with Arab countries to ensure a stable petroleum supply to prevent Japan being thrust into an oil war again the future. After dropping out of Kwansei Gakuin University's School of Sociology in September 1971, she went on to study Arabic at the American University in Cairo and received a Bachelor of Arts in Sociology from Cairo University in October 1976. When she was 21, she married a fellow Japanese student but divorced soon after. She began to work as an interpreter of Arabic and later became a journalist, interviewing Muammar Gaddafi and Yasser Arafat in 1978, and becoming a news anchor in 1979. She received the Female Broadcaster of Japan award in 1990.

Yuriko Koike (小池 百合子 , Koike Yuriko, born 15 July 1952) is a Japanese politician who currently serves as the governor of Tokyo. She was a member of the House of Representatives of Japan from 1993 to 2016 (when she resigned to run in the Tokyo gubernatorial election), and was previously the Minister of Defense in the cabinet of Prime Minister Shinzō Abe, but resigned in August 2007 after only 54 days in office. On 31 July 2016, Koike was elected Governor of Tokyo, the city's first female governor.