In addition, it was assembled in the style of jigoku-gumi (hell-like assembly) in which vertical and horizontal crosspieces were set in the same style as present day kumiko, which is said to be a very elaborate technique.
しかも現在の組子と同じ縦横の骨を交互に組付ける地獄組で、大変手のこんだ作り方であるという。