>>1298192you can litteraly name any short ultra light spinning rod as a light rock one, same goes for heavy rock rods, tho the original japanese technique is called ajing; horse mackerel in english and it is practised exclusivly on saltwater. As for the rods there is no set rule on composition apart from carbon and you can find from extra fast action nible tip parabolic rods to ultra slow 3/4 parabolics that bend almost like a fly rod. In Greece we use them to hunt for white trevally that gives a hell of a battle with such a finesse set up and is quite a fine delicacy especialy roasted over fire with oregano and olive oil.
E.g. my two rods are an Absolut toro light that stands at 2.10 mtrs and a Majoracft turel (a midrange spinning line that has two shorter and lighter lrf versions). As for the heavy rock fishing and since they are even less popular outside japan most of the rods on sale are shorter medium spining rods (e.g. I use a Savage Gear MPP that is 2.50mtrs).
tl:dr; Its short spinning rods and dont even get me started at the ongoing debate wheather sold tips or tubular tips work the best(the japs mainly go for solid when using plastics and tubular when using metal jigs and heavier (5-12 gr) crank baits).