7孔

4 Blockheads of 7 holes (great "メリ" )
　4.1 Blockhead (3.5 hole) (in the chart below the left)）
　(1)When there is a part to tie just midmost
　　①I have the position of the ideal hole and a share of coming at the same time in the
      middle
      Therefore, I will empty the 3.5 hole into the low position
      I mean that a result, pitch do not rise
　　②Therefore, invention sharpens it diagonally to raise pitch to show it in the chart
      below, and to increase the area of the hole is demanded
　　⑤A gap occurs to the ring in the hole blockhead and the bamboo of the "尺八" body, and
      a sound is sometimes for a puncture
      Therefore I pour superglue into the gap
　(2)When a part to tie is nearer 3 holes than the middle(the chart below bottom)
　　 In this case there is a method to glue two parts of the "尺八" together decisively, and
     to make one
     After that, I will empty a hole some other time again. This is a method to do well
  4.2 Blockheads of great "大メリ" of ツ (0.5hole) (in the chart below the right)
　　 I empty a small hole into the position of the little finger and can make a sound
     While by some bits raise it, and they confirm pitch, I empty it