After looking at his Instagram I have the following very inexperienced comments...
- Some of his 'honyaki' knives look like they're acid etched which I have no issue with, but they don't really show a true Hamon.
- His true Hamon blades are much closer to the cutting edge than most traditional Japanese honyaki knives, which probably isn't great in terms of how long it can be sharpened.
I don't really know enough to comment so I may be wrong, they still look great however.
EDIT: Nevermind, looking further back he has a bunch of really great Hamon's.