Got this done in Yokohama by Horiyoshi III Sensei 9 years ago. The whole thing took less than 3 hours but I had to fly there twice cause the pain on my ribs was excruciating. Outline was done by machine. Shading was done traditionally Tebori style at a speed of 120 Jabs per minute. whole severed head with shading took less than 45 minutes. Mikiri border took an hour and free hand Chrysanthemum took an hour, coloured by hand.