It has become known that the wave motion of worms is effective for horse mackerel, and even in aging, worms with a large size of 3 inches or more are now widely used. In contrast, fishing for small bait-conscious herds such as fish that have become less active in the cold season and small baits such as mysidacea plankton has also required special measures to make short bites. The AmiAmi Micro, which was born as the ultimate weapon of AmiAmi, has a ring body with strong vibration while being less than 1 inch in size. Furthermore, the size that can be used for both normal hook size and small hook realizes exquisite ease of use, and it corresponds not only to horse mackerel but also to rockfish with a small mouth in just size.