Izunavi

Mizuken  (ミズケン, Mizuken) is Kurapika's master who taught him Nen.

Appearance
Mizuken is a shaggy man who is always seen wearing a Keikogi. He is sometimes seen with a bag behind him.

Heavens Arena arc
Mizuken first encounters Kurapika in a forest where Mizuken attacks him. He knows well that Kurapika is a Hunter, but he is unaware of the existence of Nen. After Mizuken fought Kurapika, he volunteers to teach Kurapika how to use conditions and pledges to conjure a chain that the Phantom Troupe's members cannot break--the Chain Jail. Moreover, he discovers that Kurapika becomes a Specialist when his eyes turn Scarlet.

13th Hunter Chairman Election arc
After the death of Chairman Netero he appears at the Hunters Association's headquarters to vote for a new chairman.

Trivia

 * He was unnamed in both the manga and the 1999 anime.
 * In the 2011 series, his name was revealed to be Mizuken.
 * His Nen type was revealed during the 13th episode of Huncyclopedia.