Japan Aerospace Exploration Agency:JAXA
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H-II Transfer Vehicle KOUNOTORI (HTV)


HTV4 (Credit: JAXA/NASA)

The H-II Transfer Vehicle (HTV) "KOUNOTORI", developed and built in Japan, is an unmanned cargo transfer spacecraft that delivers supplies to the International Space Station (ISS). Its first, "technical demonstration flight" was launched in September, 2009. HTV is scheduled to launch about once a year to contribute to the ISS operations.

HTV Overview
HTV Components
HTV Operations


KOUNOTORI6 Mission Completed

KOUNOTORI6 Mission Completed (February 7, 2017)

KOUNOTORI6 (HTV6) descended to an altitude of 120km over the east coast of New Zealand and reentered the Earth's atmosphere at around 0:06 a.m. on February 6. KOUNOTORI6 successfully completed its cargo supply mission to the ISS.

Reentry of KOUNOTORI6 was confirmed

Reentry of KOUNOTORI6 was confirmed (February 6, 2017)

Reentry of the H-II Transfer Vehicle KOUNOTORI6 (HTV6) into Earth's atmosphere was confirmed.

KOUNOTORI6 performed its third de-orbit maneuver for reentry

KOUNOTORI6 performed its third de-orbit maneuver for reentry (February 5, 2017)

At 11:42 p.m. on February 5, KOUNOTORI6 (HTV6) performed the third de-orbit maneuver for the reentry into the Earth's atmosphere. The HTV6's reentry is scheduled for 0:06 a.m., on February 6.

*All times are Japan Standard Time (JST)

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