Applicants must apply through a consulate or embassy of the country in which they hold citizenship, must interview at their assigned time at a consulate or embassy in that same country, and must also depart on the assigned departure date from a designated airport in the participant's home country. If an applicant is willing and able to fulfill these criteria, he or she may apply from abroad. Specific placement requests can be written on the application form, although these placement preferences cannot be guaranteed. Rejection by the participant of the post offered will result in disqualification from the program. Participants may also be responsible for providing a security deposit before moving into an apartment.
Most JETs live on their own rather than in a homestay situation or with roommate.
Strictly speaking, the JET Program does not allow participants to change positions while in Japan. However, in rare cases, participants have been able to make special arrangements with their host institution. The best advice would be to apply for the position you are most interested in from the outset, and expect to fill that job for the duration of your contract.