My flight arrival at 10:30p.m 21 oct, I would like to know if I book your hotel for 22 oct would you still accept me at 1a.m 22 oct? I'm also worry that no public transport for so late at night to come to gotanda station.
1am 22 oct means you have to book the hotel for 21 oct. 22 oct booking means you can only check in at 3pm on the 22nd.
Which airport are you coming into - my hunch is that it is Haneda, and there is transportation - check airport limousine to Shinjuku station, then yamanote line to gotanda. Last train is around 1am.
If it's Narita airport I'm not so sure of public transportation as it seems to close early.
Get an answer from Hotel MyStays Gotanda Station staff and past guests.