Kansai International Airport (RJBB/KIX), Osaka, Japan has 3 private jet terminals serving business and general aviation. Its 4,000 m runway takes aircraft up to ultra-long-range business jets (Gulfstream G650, Bombardier Global 7500). 2 of them coordinate customs and immigration. 2 of them stay open around the clock. In-flight catering can be arranged on site. With 3 operators on the field you can compare handling quotes before committing to a turn.
Geographic coordinates: 34.43200, 135.24400. Use the FBO Finder map to plan a route and compare nearby airports.