Reverse Hackle
the Takayama Sakasa Kebari are thought to be one of the older "sakasa" (reverse hackle) patterns used in tenkara fly fishing. It's an "elaborate" fly compared to some of the other tenkara patterns, for this one has a peacock herl collar, and a "butt". We'll never know whether it really is one of the oldest sakasa flies,but it's a beautiful one.
These are tied with the softer part of a hackle, which makes them a great mix of soft-hackle wet flies, and the stiffer hackle sakasa flies. They can be very effectively fished as a wet fly (swung), or by giving it some life by light twitches on your rod.