They take one to two months to make. I waited and waited and waited and today my Watanabe sun and moon watch arrived. It's even more handsome than I expected. I ordered it from Rakuten (a Japan online store). It looked good online, but when I put it on my wrist, it looked perfect. I have a couple moon phase and sun and moon watches, but this is by far the most attractive one that I own.
This particular watch has a quartz movement. I'm now waiting another two months for another, handmade Watanabe watch, which has a mechanical movement. Watanabe Masaaki Watanabe Studio is in Tokyo. When you order one of their watches, you can choose some different configurations, including the band color and whether you prefer a flat or cratered case. My Watanabe sun and moon watch has a flat case; my next Watanabe watch will have a cratered case. I can't wait!