After that had been trimmed, mark a line about 2 mm from the back and another line in the centre of the spine. Grind from one line to the other to make 1/2 the mune. Note the clam shell shape of the cutting edge.
Next mark out the line 2 mm from the back on the other side and grind to finish the mune.
Place a line about 1/3 of the way from the back (about 7.5 mm in this example) and mark a line that follows the curve of the kissaki.
Grind to the line and down to the dull cutting edge to form 1/2 of the kissaki.