The earliest bus departs 6:21am from Hakata Bus Terminal and will arrive 6:36am at the international terminal. The earliest subway departs 5:50am and arrives 5:55am at the airport.

Hello, it is Japan, everything runs on time - it is wonderful 😊. Having said that, we had the same sort of decision with a later flight & went for the earlier bus from Kurokawa to allow for road closures etc (there was a snowstorm, however, the bus made up time later), & to allow enough time to check into our flight. You are allowing one hour - I think it is tight/ not enough time to alight from the bus, collect your luggage, walk to the airline counter, check-in - however, I err on the side of early to the airport so I don't stress. Enjoy the magic of Kurokawa.

Next time you ride if you insist. For Nishitetsu bus, Nishitetsu train stations will also accept it.