I'm arriving at Haneda via ANA domestic flight on a Friday, then departing on an international flight from Haneda on Delta on Sunday (actually Monday, just past midnight). Upon arrival on the domestic flight, I'd like to store some luggage at the international terminal for a couple of days to pick up before checking into to the Delta flight.

I guess I'll arrive at the domestic terminal and then take a bus over to the international terminal with my luggage. But then were do I store the luggage? It seems that there are 3 facilities at the international terminal. Which one is closest to Delta check-in?

After storing the luggage, I want to catch a bus to Yokohama. I assume that is just outside the international terminal, right?

Haneda International Terminal is not that big, so any of the 2 3/F facility will work
http://www.haneda-airport.jp/inter/e...html#temporary
It's on the 1/F of the terminal building. Also note that there's direct train service on Keikyu to Yokohama if it fits your bill.

Thanks to ChrisLi for the reply, which was spot on.

Just to follow up for any who might face something similar in the future. The bus to the international terminal from domestic is similar to the one that runs between T1 and T2 at Narita. If you have luggage, they don't have a rack in the bus, so I just stacked my bags on the floor. Fortunately not too many riders so I didn't get in anyone's way. Some buses only go between the two domestic terminals, while others also go to the international terminal. They stop at the same numbered stop, so it might be something to look for.

The international terminal is indeed not so large. I stored my bags at a counter set up for that purpose on the 3F close to the check in counters. Cost is 500 yen per bag per 24 hours.

From the international terminal, it was easy to find the buses to various parts of greater Tokyo/Yokohama, etc.