Tojiro Senkou knives are made in the Damask style by continually folding layers of soft and hard steel. High grade Japanese VG10 steel is worked with a softer steel with a higher carbon content.
The VG1O steel is very hard and can be sharpened to give a particularly fine edge..
The high carbon steel layer ensures that the knives do not become brittle. smaller knives are made from 37 layers of steel, deba knives from 19 layers of steel and larger knives have 63 layers of steel.

The handles are made from Micarta and Stainles steel, they are deeper and more substantial than the handles found on most Japanese knives.

Heston Blumenthal recomends Tojiro Senkou

Tojiro Knives – Japanese Quality and Tradition