The knives I use in my videos are Miyabi knives made by Zwilling J.A Heckles they make several ranges of Japanese knives which can be categorized in to 4 types:
I personally prefer the Miyabi 5000MCD Birchwood series, mainly because the blade is extremely thin beautifully made and most importantly extremely sharp. Also it feels much better holding the Birchwood handle than the normal handle on the other Miyabi knives.
Miyabi 5000MCD 8″Chef knife Gyutoh
Miyabi 5000MCD 7″ Santoku