If you go to the coast, south of Tokyo either on your way out or on your way back, thats where me and most ex-Rikkai's will be for the summer.
I'll send you my address. If you come visit, I'll take you to the best damn bakery in all Kanagawa (which happens to be the bakery where I used to work (｡•̀ᴗ-)✧ )
My family's very welcoming.
Take lots of photos on your trip!