This is a new Emon-nuki (collar helper) from Shizuka Naganuma. Emon-nuki is an item used to prevent the collar from losing its shape when wearing a kimono, and it's an accessory for beautifully adjusting the collar of the kimono. You sew it onto the undergarment (Nagajuban) and pull the collar through it. If you need more than 5, please feel free to contact me!