Adding on:

If you have lots of luggage, I strongly suggest the first thing you do upon arrival at the hotel in Tokyo is to repack everything you need for your short stay in Japan into one bag each. Everything else, arrange with the hotel to have shipped directly to KIX to be held for your departure day. They will arrange for the shipping and have it held at the takkyubin counter in the departure lobby where you can claim it just before checking in for your flight home. With less luggage, the shinkansen to Kyoto, and the Haruka Deluxe express from Kyoto-KIX, will be simple. This is the way most Japanese travel around their country.

JR