First Cabin Haneda Terminal 1 Hotel Review | Tokyo Haneda Airport's Hotel 

Check-in is available even at night. However, Terminal 1 closes at 0:30. After that time, you must enter through the dedicated service entrance near the bus stop in Terminal 1. Please refer to 00:43 in the video for the location. Notes. Late at night, you must take a cab from Terminal 3 to Terminal 1.

@@milesclass thank you very much.

基本は19時で空室状況等によってアーリーチェックインプラン（15時や17時）が出る感じだと思います。