Okinawa arrival at night

Hello
I'm traveling in september to Japan and my first days I'm going to Okinawa, however I'm worried about my arrival since my plane lands around 10pm (on a tuesday) and I'm not sure how long it takes to pass through customs.
I'm planning on staying at Asahi's Guest House that supposedly is open until midnight but I don't know if I'll have enough time to get there or what to do if I can't.
Any suggestions?

Thank you!

I'd advise you to check whether your flight to Naha is an "international" flight, as I couldn't find one to Naha Airport arriving at around 10PM.

Naha's international flights are only served from Taipei, Seoul, Shanghai, Beijing, Hong Kong and Taichun(and Guam seasonally.

You need to clear the custom and immigration at Narita or other airport in Japan if you fly to Naha domestically.

sorry, I forgot to mention though I'm from Mexico I do make the conection in Narita :-)

If your flight from Narita arrives at 22:00, you should normally be on board of the monorail (or a taxi or bus) by 22:30 at the latest and at the guesthouse around 23:00.

Thank you Uji! I'm glad to know it won't take too long to exit the airport