I've written about here.
If you are visiting for fabric then you can't do better than read this blogpost for directions from the station and a run down of shops. The information is still correct and her favourite shops are coincidentally mine too (I only just noticed this even though I've referred to her directions several times).
When you come out of the station you'll find this guy waiting for you.
Outside, another Tomato shops sells notions including all these colourful zips.
Heading back towards the station this is another nearby shop that stocks a lot of japanese style printed cottons.
If you do happen to visit there are a number of cafes near by which are all of the usual good standard, but there is also a shop called Cozy Cakes Ginza, or something like that, which you often see branches of near stations. Their chocolate cake, middle of the photo below, below the orange things, is the closest I've had to a Sara Lee Chocolate Gateaux - now sadly discontinued.
Pooch tells me the others are very nice too, but I know where my heart lies. Once you have told them what you want they'll ask you how long your journey home is and give you an appropriately sized and self-contained ice pack to go in the box to keep your cake refrigerated on the way home. Genius.