Hmmm, I'm not sure what the mountain range is called. Shame on me! I know that I'm in a region called the Kanto Plains, and if the sun hadn't been quite so bright when I took the picture you would be able to see Mt Fuji just a tiny bit to the left.

Here's a pic I just took, It's getting dark out so it's not the best. Fujiyama is the big flat topped volcano towards the left of the picture.