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H-II Transfer Vehicle KOUNOTORI (HTV)

HTV9 Mission

HTV9 mission logo

Developed and built in Japan, the H-II Transfer Vehicle (HTV) known as "KOUNOTORI (meaning 'white stork' in Japanese)" is an unmanned cargo transfer spacecraft that delivers supplies to the International Space Station (ISS).
"KOUNOTORI" provides very basic support for ISS operations by delivering up to six tons of cargo and has the world's largest transportation capacity. It also has the unique function of carrying multiple numbers of large-size experimental instruments on one flight.


Reentry of KOUNOTORI9 was confirmed (August 20, 2020)

The reentry of the H-II Transfer Vehicle KOUNOTORI9 (HTV9) into Earth's atmosphere was confirmed.

KOUNOTORI9 performed final de-orbit maneuver for reentry (August 20, 2020)

KOUNOTORI9 performed three de-orbit maneuvers for reentry into Earth's atmosphere.

» HTV9 Mission News

HTV9 Mission Schedule (as of August 20, 2020)

Item Schedule*1
HTV flight name HTV9 (KOUNOTORI9) (The ninth HTV flight: HTV9)
Date of Launch May 21, 2020
Time of Launch 2:31:00 a.m.
HTV9 capture 9:13 p.m., May 25, 2020
Berthing completion to the ISS 3:25 a.m., May 26, 2020
Departure from the ISS 2:37 a.m., August 19, 2020
Estimated re-entry*2 4:07 p.m., August 20, 2020
Estimated splashdown 4:19 p.m. - 4:57 p.m., August 20, 2020
  • *1 All times are Japan Standard Time (JST. UTC + 9 hours)
  • *2 Altitude at 120 km

Major payload to be delivered on board HTV9

Major payload to be delivered on board HTV9 is as follows.

Cargo in the Pressurized Logistics Carrier (PLC)

  • Utilization/experiment-related items
    • integrated Standard Imager for Microsatellites (iSIM)
    • Solid Combustion Experiment Module (SCEM) and related equipments for the "FLARE"
    • Broadcasting related equipments for "The Space Frontier Studio KIBO"
  • Cargo for the ISS crew
    • Fresh Food
    • Crew Provisioning Items

Cargo in the Unpressurized Logistics Carrier (ULC)

  • ISS Li-ion battery Orbital Replacement Units (ORUs)

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