This Japanese movie from 1989 is the sixth and final one in the Guinea Pig series. However, it's the second of two in the second wave of the series - the second and final one in the series to have been produced and distributed (beginning on March 21, 1989) by Japan Home Video, which revived the series a year and a half after Sai Enterprise, the company which previously produced it, went bankrupt. That's why the movie's on-screen Japanese title includes the volume number '2'.