Franc Franc is a wonderful homewares store, with many branches around Japan. http://www.francfranc.com/
They sell everything you could possibly need for your home. All their products are very modern and stylish. Unfortunately, I could only buy a few things as most of the items I liked were bulky or heavy. Iwent to the Shinjuku and Shibuya branches. They were also having a big sale, so the prices were very good.