It's an animated variety show featuring the works of Monkey Punch that aired on WOWOW with the episodes being 52 minutes long. 12 episodes were aired between July 31, 2004 to June 25, 2005 and received a DVD exclusive 15 minute long special called Crime Mate. (Source: Wikipedia, Lupin III Wiki)

Each episode is divided into Mini Stage lasting 15 minutes and Grand Stage lasting 30 minutes mixed with 60 second segments. The Lupin characters appear in small 60 second segments called The Lupin Gang however they are voiceless as it relies on visual gags, they also appear in the Mankatsu Monkey segments featuring a monkey that only says "Mankatsu". Outside of Japan, the series only received a TV airing in Italy on the defunct satellite channel Cooltoon and received a DVD Box Set in France. It also received a Russian dub. (Source: Wikipedia, Lupin III Wiki)