Hey r u guys worry about radiation issue in Japan, especially Tokyo?

hi guys.. I will be going to Tokyo this month end.. It is a bit too rush to book a hostel now. Can you guys recommend a few good one?
I have read the thread, most of the places mentioned have been booked but would like to hear more from you guys.

I am thinking to store my luggage in narita airport, not sure if anyone has done that before? I need to store for at least 3 days, understand that they have limitation days to store. Alternative, I might need to drag the big luggage with me to take the airport train to Tokyo city. Will this be a good idea? Thanks