Is Tokyo safe to travel to for 10 days?

My girlfriend and I booked a trip to Asia well before the earthquake. We are going to China, Thailand and then Japan, with the only Japanese stop being Tokyo for the final 10 days. The radiation levels naturally have me concerned and I want to know just how safe it is. I’ve done a bunch of research and as far as I can tell the background radiation levels are normal and safe. I’ve also come across other sources speculating that there is a lot we don’t know and it isn’t safe at all. It’s hard to find sources I can trust though.

Does anyone know of any trustworthy sources putting out accurate information about the current state in Tokyo? Also, if anyone is familiar with radiation on any level, would you be able to tell me if staying for 10 days poses a serious risk? As far as I can tell, it doesn`t, but I don`t want to put myself at risk.