I think you would be surprised at the ability of a tenkara rod to stop a fish's run by gradually increasing the resistance. If you chose a much stiffer rod to handle occasional large bass (many of which you could land with a tenkara rod anyway) you might get a lot less enjoyment from the bream and average sized bass. In addition to the rods goneflyfishing and narcodog suggested, you might want to also look at a Daiwa LT39SF. It is a little shorter than the Amago at about 13' but noticeably lighter and the center of gravity is closer to the grip, which reduces swingweight. If you use 6 lb test tippet and check your tippet frequently for abrasion, I doubt many bass will break you off.