Nohkan

The Nohkan (能管) is a high pitched, Japanese transverse bamboo flute, or fue (笛).

The nohkan flute was created by Kan'ami and his son Zeami in the 15th century, during the time when the two were transforming the Noh theatre forms Dengaku and Sarugaku.

The nohkan has an unusual internal bore restriction of about 2–3 mm called a nodo ("throat").

This throat, combined with the conical bore, gives the nohkan its unique high pitched sound by shifting the overblown register notes via a venturi effect.

It also has an oval embouchure hole across which the player blows, and a head joint plug consisting of a lead cylinder wrapped in paper and wax and placed inside the tube just above the embouchure hole.