Japanese goods are hard to find in the US, though they are increasingly becoming more available. When I was starting my kit, I had no idea where to purchase many items I needed. I set up a forwarding service and used my meager command of the japanese language, along with google translate, to get started. 

I have personally purchased from most of these stores, so I can recommend them with confidence. However, not all of these stores sell exclusively pre-1600 items, so do your research before buying.

What I learned, bought, and used started a practice of integrating traditional tools and garments into my everyday life. While not all of these items are useful to the re-enactor, most are of at least passing interest. 

I have found many traditional items are wonderful in daily living, such as the brooms, futons, and tabi shoes. Many are a great compromise for camping, with modern materials and a traditional design. And some haven’t changed a bit in over 400 years. So many things just make sense, and are more durable and easy to use than their modern counterparts.