Naomi Koshi

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Naomi Koshi
Naomi Koshi (Japan Update 2016).png
Mayor of Ōtsu, Japan
In office
January 2012 – Incumbent
Personal details
Born (1975-07-05) July 5, 1975 (age 44)
Political partyIndependent
Alma materHokkaido University; Harvard University

Naomi Koshi (越 直美, born July 5, 1975) is a Japanese politician, lawyer, and advocate for gender equality. In 2012 she became the youngest woman elected mayor of a Japanese city. Koshi serves as the Mayor of Ōtsu, Shiga Prefecture.

Early life and education[edit]

As a child, Koshi was inspired to become a politician when her mother had to leave her job for 10 years to take care of Koshi's grandmother. The mother had no assistance from the government.[1]

Koshi attended Shiga Prefectural Zeze High School then moved on to Hokkaido University's law department.[2] Passing the bar exam in 2000 and became a lawyer, she worked at the Nishimura & Asahi law firm. Koshi also worked as an adjunct professor at Waseda University in 2005.[2]

Koshi earned a master's degree in international law from Harvard University Law School in 2009. Her thesis was titled Takeover Defense in Japan.[3] According to the City of Otsu, Koshi passed the New York State bar exam and worked for Debevoise & Plimpton LLP.[4][5] Koshi was a visiting fellow at Columbia University's Center on Japanese Economy and Business from September 2010 until January 2011, while undergoing traineeship at the United Nations' legal department.[5]


In 2012 Koshi was elected mayor of Ōtsu, Shiga Prefecture, Japan. She is the youngest woman to be elected as mayor of a city in Japan.[6][7] During her time in office Koshi has advocated for gender equality measures that would make it easier for women to stay in the workforce after having children, such as improving access to childcare and parental leave.[6] In 2018, Koshi and Tomoko Nakagawa [ja], mayor of Takarazuka, Hyogo, also pressed the Japan Sumo Association to change some of its gender-based rules after a female nurse who entered the sumo ring to conduct CPR was ordered out of the ring because only men are allowed in.[8]

In 2015 Koshi was selected as a Young Global Leader by the World Economic Forum.[9]

Selected bibliography[edit]

  • Shinkawa, Asa; Fukuzawa, Mihoko; Koshi, Naomi (2005). "Dai 3 shō : Soshiki saihen kōi" (Tokushū emu ando ē jigyō saisei no shiten kara mita shin kaishahō kyū ando ē (85-mon))" [Chapter 3: The deed of turnaround (Feature: Turnaround with M&A under new Company Law, 85 Q&As.)]. The Turnaround & credit management. Kinyū zaisei jijōkenkyūkai. 19 (3): 74–94. ISSN 1348-8953.
  • Koshi, Naomi; Kubo, Kimiko (May 2012). "Wakasa/keikenbusoku eno fuan wo hanenokete : fukushi/josei no shiten ga genten — 36-sai no Otsu-shicho Koshi Naomi san ni kiku" [Fighting back the Anxieties against a young and an inexperienced: From the viewpoint of welfare and women — interview with a 36-year-old Mayor of Otsu, Naomi Koshi]. Josei tenbo (in Japanese). Ichikawa Fusae Memorial Woman and Politics Center Publication (647): 8–10. ISSN 1345-7098.
  • Koshi, Naomi (2014). Kyōshitsu no ijime to tatakau: Ōtsu ijime jiken josei shichō no kaikaku [Bullying and Teasing in the Classroom: Otsu Bullying Case, Reformation lead by the Female Mayor] (First ed.). Tōkyō: Wani bukkusu. ISBN 9784847065538. OCLC 892815261.
  • Koshi, Naomi (2018). "Jichitai-kan kyōsō: Sono sakini (dai 19-kai ajiataiheiyō fōramu Awaji kaigi 'kokusai shinpojiumu' toshi wa kyōsō suru: Sōzō-sei to tayō-sei) — (paneru disukasshon — toshi no kokusai-kyōsōchikara o sasaeru seichō senryaku)" [Competition among Local Governments: What awaits beyond that (The 19th Asia-Pacific Forum : Awaji Conference 'International Symposium on Cities and Competition: Creativity and Diversity — Panel Discussion on Growth Strategies to Support International Competitiveness for Cities)]. 21st Century Hyogo : Research Information Magazine, Hyogo Earthquake Memorial 21st Century Research Bureau (in Japanese). Hyogo Earthquake Memorial 21st Century Research Bureau (25): 93–96. ISSN 1345-9368.


  1. ^ Rice, Lewis (July 3, 2012). "Leading My Hometown". Harvard Law Today. Retrieved 2019-05-18.
  2. ^ a b "プロフィール". こし直美 公式ホームページ (in Japanese). Retrieved 2019-05-18.
  3. ^ Koshi, Naomi (2009). Takeover Defense in Japan: Analysis of the Bulldog Case by Comparing U.S. Cases (Master's). Harvard Law School. OCLC 465456041.
  4. ^ "Naomi Koshi". World Economic Forum. Retrieved 2019-05-18.
  5. ^ a b "大津市長のプロフィール|大津市" (in Japanese). Retrieved 2019-05-18.
  6. ^ a b "5 ground-breaking female mayors you might not have heard of". World Economic Forum. Retrieved 2019-05-18.
  7. ^ Koshi, Naomi (April 2012). "Watashi ga "Sainensho josei shicho" desu (tokushu: Onna no hitori-gachi)" [I am "the youngest female mayor" (special feature female one-handed victory)]. Shincho 45 (in Japanese). Shinchosha. 31 (4): 48–50.
  8. ^ "Japan's youngest female mayor takes on its oldest all-male sport". Public Radio International. Retrieved 2019-05-18.
  9. ^ "Young Global Leaders are the vanguard in business, politics and society". The Japan Times Online. 2015-09-09. ISSN 0447-5763. Retrieved 2019-05-18.

External links[edit]

Political offices
Preceded by
Makoto Mekata [ja]
Mayor of Otsu, Shiga