Basic facts about Nohkan

1. The Bore Restrictor (The Node)

A small bamboo tube called the throat (node) is inserted inside the bore between the blowhole and the first finger hole. This structural restriction disrupts linear pipe acoustics. When overblown, the pitch does not jump a perfect octave (2nd harmonic), but rather a variable interval like a minor 7th.

 

2. Non-Diatonic & Unpitched Role

Because of manual node placement, no two Nohkan share the same pitch intervals. It does not play diatonic or pentatonic scales. Instead, it interacts with unpitched drums in theater ensembles, focusing entirely on specific melodic contours, abstract emotional shapes, and motifs.

 

3. Inside-Out Construction

The flute is made from smoked bamboo that is split lengthwise, flipped inside-out so the hard outer bark lines the inner bore for high sound reflection, and glued back together. The exterior is wrapped in cherry bark or hemp cord and sealed with heavy urushi lacquer.

 

4. The Hishigi Register

By applying intense air pressure against the restricted bore, players produce an ultra-high, microtonal screech called Hishigi, used dramatically to signal major shifts or otherworldly character entrances.

 

 

 

 

Nohkan flute Japanese Noh flute Traditional Japanese flute Nohkan instrument