 It has been expanded and upgraded several times; a taxiway parallel to the runway opened in 1988, a Category 3a instrument landing system (ILS) became operational in 1995, and a new passenger terminal, 2.6 times the size of the original terminal, opened in 1998.Kushiro Airport has a single passenger terminal on three levels with three boarding gates.It is designed primarily for domestic flights, but has limited customs and immigration facilities for international charter arrivals.