I am traveling to Tokyo for 2 days and staying nearing Shijuku station. Thereafter I will be traveling to Gotemba, Kyoto, Nara and Disneyland all via JR train and has plans to return to Tokyo in 7 days. I have 2 Luggages and has plans to keep 1 luggage in Tokyo while I travel to the other states with only 1 luggage. I heard there are lockers at the JR Station at Shinjuku. How much are the charges and can I have the lockers for 7 days?