[header] How to prepare a packing checklist for tokyo [title] Think light and small-compared with westerners, japanese people tend to travel with smaller size luggage. [step] As a result, there usually isn't a wide space to store large luggage in trains (including the bullet train). Coin lockers in subway stations aren't large enough to hold big suitcases either. 
Subway stations in tokyo consist of endless pathways, some include stairs (and no elevators). Planning to use the subway with luggage in hand is not a good idea.