Beautiful finish up of the edge using ”Herikaesi”(interfold the edge and stitch) and “Yose“(uniquely folding the four edges) process by only skilled artisans. This makes the case durable.

Horizontal and vertical stitches in two points for the card slot is called “Ripple”.
Ripple is a registered design by Sakamoto Radio and it prevents the cards from slipping off even after a long use of the case.