Join Date: May 2005
Location: various cities in the USofA: NYC, BWI, IAH, ORD, CVG, NYC
Programs: Former UA 1K, National Exec. Elite
Posts: 5,487
Not true for HND
Note that US-HND flights do not follow the pattern. There are midnight US departures arriving into HND at 5am or so, as well as ~6pm US departures that arrive around midnight.
Why the difference? I can think of two reasons: lack of curfew and the higher rate of O/D traffic (non-connecting passengers).
Note that you can include both NRT and HND in a search by using TYO (NYC for JFK, LGA, & EWR; WAS for IAD, DCA, & BWI; LON; SEL; etc.)