I see an old thread dealing with NRT and this issue. I have a simple question and wonder if someone has the definitive answer. I'm getting non-answers from JAL phone reps and no response to my JAL customer service online query. Based on my long overnight connection, can my baggage be checked through or must I pick it up at HND? It makes a difference in my airport hotel accommodation.

My flight lands HND at 17:15 and the connecting flight is the next morning at 8:35. In the absence of the facts, I've changed my reservation at the Royal Park Haneda from the airside part of the hotel to the land side part. Royal Park charges for cancelations less than seven days out and my arrival into HND is 3/15 so I can't wait until the last minute to make any further changes. Any insight is appreciated.