"I have been very satisfied with Tenkara USA in the 5 years I have fished my Iwana."
Sure, nothing to be unhappy about… UNTIL you try the Japanese rods, that is. I really like and respect Daniel and TUSA, so in no way is this meant as a knock against them, especially because the Rhodo and Sato are much more "tenkara" than the Iwana is, and I think they are absolutely moving in the "right" direction. I used to have 2 Iwanas, now I just have one for "back up."
I've been to Japan to fish Tenkara with some of the guys over there… they don't all use rods with cork grips and they like to use rods that may be categorized as Keiryu for Tenkara too. Just trust me when I say that none of us know shit about tenkara rods until we try a bunch of them. Its pretty amazing what else is out there.
My eyes were opened. The Iwana is a bit stiff. Its a great rod, and its a great "multi-use" and "do it all" rod, because you can take it on the "average" US river and catch and LAND fish. However, I'd want to point out that its not all that "tenkara" compared to many many other rods I've fished, in terms of its flex and overall feeling while fishing.
Nissin is just one example. Suntech is another. Daiwa is yet another. Don't be limited to cork grip rods either… I've found that my favorite rods tend to be classified as "keiryu" or "seiryu" rods that have no cork but tenkara action rather than stiffer or too light action.
I only use shorter rods where the cover is low, from your pics it looks like a 9-11 foot rod is not out of the question… don't be worried. Tenkara rods are insanely light, and just because they are long won't mean your daughter can't fish them. Just explain that its a very long magic wand :) The longer the rod and the shorter the line, the better your drift and the more you're going to focus on your skill and river-reading skills… all stuff you probably know already.
The key is to have a very sensitive rod tip for tenkara… which means, if you want bigger fish, you need a longer rod. If you "compromise" you'll end up with a rod that is stiff, and can land "big" fish. But what you really want is a proper balance in your rod, and where you use skill and the water to land your fish, not just a big rod that pulls however you want it to…