Soundtrack ID Mystery

For the longest time I've been trying to identify the classical guitar music playing from roughly the 1'58" - 2'02" point in the film; The purple-tinted monologue (interrupted by a minute of a white screen) where I believe Terayama himself is smoking a cigarette in a tenement hallway and comparing the state of postwar Japan to a lizard trapped in a Coca-Cola bottle.

Since the official soundtrack contains nothing resembling said music and the ending credits consist of a scroll of nameless faces, I'm at a loss. If someone can correctly ID the song in question I'll mail them a lizard trapped in a Coca-Cola bottle via overnight air delivery.