Another poster that brought up the back and forth I was planning on the shinkansen.

Shinagawa to Osaka overnight (for USJ, Osaka Castle, Dontombori, Umeda Sky Building), Shinagawa to Kyoto (Arashiyama Monkey Park and Bamboo Grove, Fushimi Inari Shrine), Shinagawa to Nagoya (Summer Basho).

Even I talked with my wife awhile ago about staying in Osaka but didn't want to lug all that luggage on the train.

I didn't know about it back then but learned about luggage forwarding service so now I'm thinking instead of staying at Prince Sakura Tower for 2 weeks, stay there one week (or better yet, 9 nights), and then the Osaka Marriott Miyako and return home via KIX.

Does the Prince Sakura provide the drop off to a delivery service and if so, which ones? I understand that it takes a day for delivery.