Your friendly mod has moved these posts to a more relevant thread
Technically it's a separate airport, so ordinarily the answer would be no, but since you're flying on NH metal, and if you're booked on a single ticket and making a same-day transit, I would think they would allow you in. Be prepared to be turned away, however; also keep in mind that the HND Suite Lounge will be closed until mid-March due to the terminal expansion.