Originally Posted by CGK

Thomas:
I don't think you can check-in the evening before your flight. The check-in counter opens about 4am I think.
There is a somekind of transit hotel room in the secure area, but could not find the link at the moment. Still, pretty expensive. Again, I don't think the immigration will allow you to the secure area the evening before without a BP.

Note: Don't forget the options for the lounge in the morning. The UA check-in agent usually will direct the pax to RCC. But I am sure you have know it well that it is much better to use the TG Lounge.

I wonder what make you take UA, not TG to NRT? Or take SQ the late evening flight?