For Hon Choshi or San Sagari tuning:
1. Press the ‘4’ position on the ichi no ito and sound it.
The pitch of the open middle string should be exactly the same as position ‘4’.
2. Listen to the pitch, then tighten the middle string until the pitch sounds exactly the same as position ‘4’ on the thick string.
For Ni Agari tuning:
1. Press position ‘6’ on the thick string.
2. Tighten the middle string until the tone matches.
