Yumi Naoshin Carbon, standard size. Purchased from Koyamayukyuten. (Currently 46,200 yen) I strung a string and shot with it, and there were no problems at all. I haven't shot it even 100 times. Personally, I was able to shoot more stably with less recoil than the Naoshin II. As you can see in the photos, there are basically no major scratches or damage. The upper nock, lower nock, and upper grip plate are also relatively clean.