Baggage drop off with Delta at Haneda Airport

[Mj17ak]

Does anyone know how early luggage can be dropped off with Delta at Haneda Airport?  Delta help desk could not answer my question; was hoping to find someone who has flown Delta from Haneda.  Our experience has been that luggage can be dropped off 3 hrs prior to departure of flight, but that can differ by airport and airline.  We thought we would wait in the Delta lounge for the several hours but if we can’t drop off bags, then we have to find alternate plan. We are also looking into a tour after disembarking the ship and before the flight.  Appreciate any insight.

[6rugrats]

Did you also ask this same question on TA?  The answer was three hours in advance.  Most airlines will not accept bags earlier than four hours in advance.