Yamamoto Oki Worm - 6 Pack - Due to the overwhelming requests from the professional anglers as well as the dedicated Yamamoto customers, Yamamoto is very excited to introduce the brand-new Oki worm. “Oki” means long sword in Japanese, and that is exactly what this worm will remind you of – a long weapon used to put more bass in your boat. The 10in Oki is a straight-tail worm that is formulated using Yamamoto's popular Mega Floater Formula, which ensures that the Oki will float vertically and be more visible as well as have more action when presented on a standup jig head.