This chapter is the continued part of a chapter “4| Names of the Part”. Please read the chapter “4| Names of the Parts” before reading the part 2.
Let’s discuss how to look for the location of the highest curvature area. Any sword in a sword book looks like a curvature comes around the middle area. That is because a photographer places a sword to fit in a certain rectangle space.
The correct way to look for a curvature is to stand the Nakago ( 茎 ) perpendicularly. That way you can see the curvature more precisely. Any sword looks like the curvature comes around the middle if the Nakago is not vertical. Rotate (move or shift) the book slightly so that the Nakago shows as perpendicular. That way you can see the real curvature of the sword.