Unit 731

The "Unit 731" collection is a tetralogy of Hong Kong exploitation films released in 1988. These films are centered around the historical context of the Second Sino-Japanese War. The entire collection has a total runtime of 105 minutes and a reported budget and revenue of zero. The collection comprises a single film, 黑太陽731 (1988), which has an IMDb rating of 6.1. This installment constitutes the entirety of the "Unit 731" collection. This film collection was active for a single year, 1988. The total runtime of all films within the collection is 105 minutes.