How to Measure a Shakuhachi for an Utaguchi Cover

The utaguchi is an inlay inserted into the mouthpiece of the shakuhachi whose purpose it is to preserve the sharpness of the blowing edge after years of playing. The utaguchi is made in two traditional styles. The name translates as "song mouth" in Japanese.

Utaguchi covers, designed to protect the delicate mouthpiece of the shakuhachi, are made by my wife Kayo. The utaguchi cover is custom fit to each individual instrument. Caps come in several sizes depending upon the diameter of the bamboo. If the flute is not on hand, it is important to have exact dimensions for the cap to be made properly.

For the snap at the rear of the utaguchi cover to work, precise measurements must be taken near the top of the shakuhachi.

Here's how to do it:

 1. Cut a narrow strip of paper approximately 1/2" wide and 6" long.
 2. Wrap the strip of paper around the circumference of the bamboo about 1 1/2" down from the top end of the instrument.
 3. Mark the place where the paper intersects itself. This will give you a linear measurement of the circumference of the flute at the place where the utaguchi cover snaps shut.
 4. Transfer the measurement to a piece of paper. With a ruler, measure the liner distance in inches or millimeters. Send this information with your order or via e-mail.
 5. This dimension will allow Kayo to make an utaguchi cover that will precisely fit your instrument.


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