On September 18, 2009 the Japanese HTV unmanned supply spacecraft was successfully berthed at the International Space Station (ISS) at 10:49 a.m. Japan Standard Time, JST (on September 17 at 22:49 UTC).

The ISS crew marked this event by canceling several covers with the board postmark dated the day of HTV docking.

All members of the ISS crew autographed the covers. It is necessary to remark that the covers were not delivered by the HTV. The covers were delivered to the ISS by a Russian cosmonaut aboard a Soyuz TMA spacecraft.