The Gamakatsu Zero Yamame Eyeless Hook is perfectly suited for fishing a single salmon eggs with a keiryu rod. I have found them to be equally effective when used with a red wiggler. I don't know of anyone (yet) who has tied flies with them, but I am sure they will prove to be ideally suited to small sakasa kebari.
Japanese size 3 (slightly smaller than the Gamakatsu Kawamushi)
15 hooks per package.