Japanese plane/kanna "Maboroshi" 70mm by Tsunesaburo

Description

Japanese plane/kanna "Maboroshi" 70mm by Tsunesaburo
This plane was made by Tsunesaburo
He is one of the best plane blacksmith in West Japan.
It was made with blue steel #1.
The maintenance of Japanese-style Planes can be troublesome!
"A Japanese-style Plane cuts well, but the maintenance is troublesome" - this is something we hear quite often.
Especially I don't understand the "tapping-out process".
I do not understand how to deal with how to tap-out the hollow-shaped blade, which is the hardest part of the plane maintenance.
Because the shiny part of the plane blade gradually wears down when sharpening, the blade edge must be corrected by "tapping-out." This technique is called "uradashi." However, this work requires considerable skill. This might be the main reason why the Japanese-style Plane is not often used.
With this plane you don't need to perform the tapping-out maintanence on the blade!
We have researched for many years how to solve this difficult problem and innovation in technology. Then we invented a technical improvement for non-tapping out maintenance-free planes.
What is the secret of this plane?
As for this plane, R is curved like a half moon shape.
This is the secret of creating the non-tapping out maintenance-free procedure.
Blade size:70mm
White oak plane body
Thank you!