What is the weather like in Japan in January?

As long as you don’t go to the north of Japan, you don’t need to bring a lot of warm clothes. Every winter, I only wear a thin woolen sweater and an ordinary thin cotton-padded jacket or coat. As for shopping, you can go to Akihabara Electronics Street. Japanese digital cameras and video cameras are very cheap. The Shiseido skin care series are much cheaper than the same products in China. Hope you have fun in Japan.