Dear Shinichi,
It's 3 months I have been using Nakiri knife from your factory.
I have to say that knife maintains sharpness for a long time. I can compare it to Tojiro knifes only, however your is much, much more better.
Knife is very handy, weight is optimal making whole day work in kitchen easy and enjoyable.
Thank you for your work and hart you put into the knife.

Best Regards