Fuji EZ Keepers were originally intended to be attached to fishing rods of any kind to have a place to stick a hook while traveling. It turns out . You don't have to take our word for it. Countless tenkara anglers in the US are using these things.
One is enough if you're just looking for a hook holder on a spinning rod. You'll need two if you want use them as line holders for your Tenkara rod.
Easy to install and remove and they don't damage the rods at all!