Konosuke sumiiro grind

[Yoshi]

Does the Kono sumiiro line have convex, concave or flat grind? Looking at getting both a gyuto and nakiri.

Done a bit of googling and answers seem to be wildly different, so wondering if anyone here can shine some light on it please?

 

[Duukt]

I just checked my 240mm and it's convex.