Due to the current Covid-19 pandemic, all regular services and hours may be subject to change. Thus, if the idea is to spend the night in the public area, consider a plan B in case the stay inside the airport is only allowed for those who are close to boarding.
Spending the night at the airport
Osaka airport is open 24 hours a day, but keep your ticket handy in case the security staff asks you for proof of onward flight to let you stay inside the enclosure.
Where to rest: There is a large number of benches with no armrests inside Terminal 1. In addition, next to the convenience store of the second floor you can find padded seats. The nearby information desk will provide blankets. Inside Terminal 1 there are also several VIP lounges, one of which is open around the clock. If you rather check into a hotel, there are two of them in the Aeroplaza.
Baggage: In addition to left luggage services, there are lockers where you can leave your bags.
Eating and drinking: There are some options that open 24 hours a day in Terminal 1 and the Aeroplaza.
Restrooms: Showers available on the second floor and inside some of the VIP lounges.
Wi-Fi: Free and unlimited.
Other services available around the clock: ATMs, currency exchange bureaus, convenience stores, children's play areas, baby changing facilities.
The Hotel Nikko Kansai Airport and the First Cabin Kansai Airport are found inside the Aeroplaza. Other accommodations in the surroundings provide shuttle services to and from the airport.
N Gate Hotel Osaka (5.8 km/3.6 miles)
Star Gate Hotel Kansai Airport (5.9 km/3.7 miles)
The Premium Hotel (5.9 km/3.7 miles)
Kansai Airport Washington Hotel (6 km/3.7 miles)
Hatago Inn Kansai Airport (6.1 km/3.8 miles)