Unit 731 in order

A tetralogy of early Hong Kong exploitation films based around the Second Sino-Japanese War. 4 films, 6h 25m in all, in release order.

Men Behind the Sun
1988 · 105 min
Japanese troops round up Chinese and Russian prisoners of war and take them to unit 731, where they're horribly tortured and experimented on to test new biological weapons.
Popcorn Flick
Men Behind the Sun 2: Laboratory of the Devil
1992 · 96 min
In 1935, Japan's Unit 731 conducts inhumane experiments. A doctor tries to free prisoners, including his fiancée, from the camp while witnessing atrocities.
New
Men Behind the Sun 3: A Narrow Escape
1994 · 93 min
During the shut down and destruction of the Japanese test camp Squadron 731 in Manchuria, a soldier becomes infected with a virus developed during the camp's testing and risks spreading it into Japan on the train ride home.
New
Black Sun: The Nanking Massacre
1995 · 91 min
Black Sun: The Nanking Massacre depicts the brutal events behind the Nanking Massacre committed by the Imperial Japanese army against the Chinese people during the Second Sino-Japanese War.
New

Frequently asked questions

What order should I watch Unit 731 in?

1. Men Behind the Sun (1988), 2. Men Behind the Sun 2: Laboratory of the Devil (1992), 3. Men Behind the Sun 3: A Narrow Escape (1994), 4. Black Sun: The Nanking Massacre (1995).

How long does it take to watch all of Unit 731?

About 6h 25m across 4 released films.

Do any Unit 731 films have post-credit scenes?

None are listed on TMDB.