A wooden coffin type called "combinational type" consists of four rectangle-shaped panels, a cover, bottom part, side plates for the right and left sides, and two small square-shaped panels, which are sometimes used as partitions.
つぎに「組合式」といわれる木棺は、蓋、底、左右の側板、計四枚の長方形の板と、前後の方形の小口板、時には別に仕切り板が付くこともあるが、二枚とを組み合わせて作った。