 He started the ISS Astronaut Basic Training program in April 1999 and was certified as an astronaut in January 2001.Since April 2001, he has participated in ISS Advanced Training, as well as supporting the development of the hardware and operation of the Japanese Experiment Module Kibō and the H-II Transfer Vehicle (HTV).From 21 July 2014 to 29 July 2014 Hoshide commanded NASA Extreme Environment Mission Operations Mission 18 (NEEMO 18) to the Aquarius Reef Base of the coast of Key Largo, Florida.