Rumour says the original cut is 8-hours long. That's not accurate. This saga is composed of three sequels, ALL named "Ninja: The Final Duel" by overseas distributors. It's hard to keep track of them all, and bootleggers used to put all three on one single tape and call it simply "Ninja: The Final Duel", thus giving rise to the 8-hour production assumption. Versions on TV and home video have bits and pieces of each film mixed in, but the DVD release by Crash Cinema is the second volume of the "Ninja" series in its entirety.