Bicycle:Rental at JR Ryogoku station
On Saturday and Sunday,you can rent bicycle.
They open from 7 am to 6 pm.
One day: USD18 to 28.
On weekend,there is a special train which you can take your bicycle on the train without folding your bicycle.It goes to China city where you can enjoy cycling.
In Japan,you can not bring your bicycle within folding it and get it to a bag.
Ryogoku station is just 10 minutes from Tokyo station.