As my CHOWHOUND friends know, I have ordered a custom made Watanabe nakiri bocho knife from Mr. Watanabe Shinichi (渡辺真一). To summarize, it is a knife based on the standard 180 mm Aogami #2 (blue paper steel #2) core nakiri knife with a thin blade customization:
The blade was requested to be thinned to 3.5 mm at spine heel and taper to 1.0 mm at the spine tip. The actual product I received is 3.0 mm at spine heel and taper to 1.0 mm at spine tip – pretty close to my request. Due to the blade customization, the kurouchi finish was removed and resulting a polished finish. The knife was made in 2 weeks and shipping to me in 3 days – though it took me another 2 days to pick it up from the postal office. I am very happy with the production speed, shipping speed... etc.