Mafia vs. Ninja also known as Hongmen jue e zhe

Plot

Two sewage workers, Jack Do (Alexander Lou) and Charlie Wu (Charlema Hsu), get mixed up in heavy business when their mobster boss is assassinated by another mobster who wants to control Shanghai and overflow the streets with opium, along with the usual mafia-related affairs such as gambling and prostitution. He is aided by a team of four professional assassins, the most notable two being foreigners: one an african american fighter called Mr. Jones (Eugene Thomas), the other an Italian knife throwing expert called Mimo (Silvio Azzolini). The other two are a japanese swordsman named Fuji and a ninjitsu kusarigama master confusingly also called Mimo.