Futsu Kebari is a stiff hackle tenkara fly associated with Japanese Tenkara Fishing. As with most Japanese flies, it is not meant to mimic a specific insect but is instead a fly that suggest it is an aquatic food source.
This is a very dynamic fly in that it can be fished as either a dry fly on the surface (add floatant if you wish), or it can be fished as a stiff hackle wet fly subsurface. Traditional Japanese Futsu Kebari are usually kept simple in design. Jonathan has created a wonderful variation of a futsu kebari here that features a peacock herl body that is twisted in like dubbing to show off a red ribbing.