Takao Doi

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Takao Doi
NASA/JAXA Astronaut
Nationality Japanese
Status Retired
Born (1954-09-18) September 18, 1954 (age 63)
Tokyo, Japan
Other occupation
Time in space
31d 19h 35min
Selection 1985 NASDA Group
Total EVAs
Total EVA time
12 hours, 43 minutes[1]
Missions STS-87, STS-123
Mission insignia
Sts-87-patch.svg STS-123 Patch.svg

Takao Doi (土井 隆雄, Doi Takao, born September 18, 1954) is a Japanese astronaut and a veteran of two NASA space shuttle missions.

Doi holds a doctorate from the University of Tokyo in aerospace engineering, and has studied and published in the fields of propulsion systems, and microgravity technology. He researched at the Institute of Space and Astronautical Science and was selected by NASDA as an astronaut candidate in 1985 for the Japanese manned space program while also conducting research in the United States at NASA's Lewis Research Center and the University of Colorado at Boulder. Doi flew as a mission specialist aboard STS-87 in 1997, during which he became the first Japanese astronaut to conduct a spacewalk.

He received a Ph.D in Astronomy from Rice University in 2004.

Takao Doi visited the International Space Station in March 2008 as a member of the STS-123 crew. STS-123 delivered the first module of the Japanese laboratory, Kibō, and the Canadian Dextre robot to the space station. During this mission, he became the first person to throw a boomerang in space that was specifically designed for use in microgravity during spaceflight.[2]

Doi retired from the astronaut duty and he works as the chief of Space Applications Section of United Nations Office for Outer Space Affairs starting September 2009.[3]

Since April 2016, he is to work as a professor at the Unit of Synergetic Studies for Space of Kyoto University.[4]

As an avid amateur astronomer, he found supernovae SN 2002gw and SN 2007aa.[5][6]


  1. ^ "Takao Doi (Ph.D.) JAXA Astronaut (Former) Biography on the NASA website". NASA. Retrieved January 1, 2017. 
  2. ^ "Boomerangs in Space". Retrieved 2011-01-19. 
  3. ^ "Veteran Japanese astronaut Takao Doi to take up UN job". The Mainichi Daily News. June 6, 2009. Archived from the original on June 8, 2009. Retrieved June 8, 2009.  (found in archive.org capture)
  4. ^ 宇宙飛行士の土井隆雄さん、京大特定教授に. Yomiuri Online (in Japanese). The Yomiuri Shimbun. March 7, 2016. Retrieved March 7, 2016. [dead link]
  5. ^ "IAUC 7995". 2002-10-17. Archived from the original on 2013-10-21. Retrieved 2014-03-27. 
  6. ^ "Supernova 2007aa in NGC 4030". Retrieved 2014-03-27. 

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