Exotic: Yoshikazu Ikeda White #1 Mizu-Honyaki Mt. Fuji Sakimaru Takohiki 390mm w/ Saya

An encyclopedia describes sashimi knives as thin and narrow, calling the pointed ones yanagiba and the unpointed ones takohiki. A sakimaru takohiki is the rounded-tip variant, so it has a rounded point despite its takohiki name.

A trade body, the Sakai cutlery association, calls the takohiki (たこ引き包丁) the Kanto-type sashimi knife, and the yanagiba the sashimi knife used mainly in Kansai, with an acute edge that is not for bone.

Yes, among Shirogami 1, 2 and 3 on Proterial's pages. It describes Shirogami 1 (白紙1号) as having the highest hardness and gives it 1.25 to 1.35% carbon, compared with high hardness and 1.05 to 1.15% carbon for Shirogami 2, and middle hardness and 0.80 to 0.90% carbon for Shirogami 3.

All three are carbon steels that can rust, so wash the knife and dry it after use.

Mizu honyaki (水本焼) is water-quenched honyaki, and Yoshikazu Ikeda's own page says it is one of the professional Japanese knives he mainly makes. The Ikeda honyaki we list under titles that say Mizu-Honyaki are water-quenched.

On hardening, Ikeda says on the City of Sakai film site that the fire's temperature is everything and that he judges it by the colour of the flame. Honyaki can run about 1 to 2 HRC harder than comparable non-honyaki knives, and how much varies by maker.

Yoshikazu Ikeda (池田美和) of Ikeda Tanrenjo (池田鍛錬所) in Sakai, who began making knives under his father, a blacksmith, in 1967 and went independent as Ikeda Tanrenjo in 1983.

The City of Sakai's register lists him under forging (鍛冶), certified in 1988.

Yes. His profile page records his certification as a traditional craftsman by Japan's Minister of Economy, Trade and Industry in 1988.

The same page dates his start in knives to 1967, working under his father, a blacksmith, and records the workshop's independence as Ikeda Tanrenjo in 1983.