You can deposit your hand luggage and send luggage.

You can deposit your luggage before checking in and do sightseeing without any luggage.
Moreover as this hotel cannot receive or deposit luggage, please send your luggage to SAGAWA Tokyo Skytree Town Service Center.
After arriving please receive your luggage and check in. It takes 5 minutes by foot to the hotel.

Please contact SAGAWA Tokyo Skytree Town Service Center for details about fees.
http://www.sagawa-exp.co.jp/ttk/servicecenter/skytree.html