Born on 17-02-1952, Died 11-03-2011.

He played drums at age 14, in one of the first incarnations of BZN, from 10-01-1967 until 17-10-1969.
He replaced Gerrit Woestenburg who had only played live with BZN in 1965-66, and was replaced by Jan Keizer in 1969.
Jaap went to Left Side (1970-1972) and played in De Dekker Band and Bzn '66 (1997-2000).

Jaap plays on the first four BZN Polydor singles
Maybe Someday / I Don't Want To Give Myself,
Waiting For You / Mor'een,
Every Day I Have To Cry / Coming To My Dreams and
Gonna Take My Mind Off Maria / (I'm Gonna Be) Your Man.
For the sixth Polydor single This Is What I Feel, an old bandphoto was used with Jaap and Evert Woestenburg, but at that time they were already replaced by Jan Keizer and Thomas Tol.

Jaap plays on 3 Left Side singles Johnny, Woman In My Life and See You Crying / Feeling Allright.