When Kitsurubami is ranting on about clothes while shooting a machine gun, her rants are all about Lupin III. In fact, Kamon is dressed up like Lupin.
The vespa that you see at the end is real, but only about 1000 were made, and the one they use during the credits has a busted motor so it does not work.
When Kitsurubami is aiming the gun at Canti, she tells Amaro that "the signal is definitely blue" (to which he replies "Are you sure it's not red?"). This is a nod to the blue souls of the angels (and the red souls of humans) in Neon Genesis Evangelion.
The subtitling introducing the viewer to the "Mabase Immigration Department" is the same font and type seen in Neon Genesis Evangelion.
While neighbors look on at Canti loading the truck, listen closely to Kamon's speech. He starts to ramble on, then at the end it winds up at driving anime Initial D. Naota tells Haruko that his father calls the story "The Life of Eva".
At one point in episode 1, Kamon mentions "Tomino" and "gundam-hammer." The gundam-hammer was a weapon used in the original "Mobile Suit Gundam" television series. Tomino (the creator/director) had the weapon removed when the series was turned into the movie trilogy. He stated that the weapon was a super-robot weapon and that the Gundam was "not a super-robot."