There is a Mikura Suzuki (from Mezzo Forte and Mezzo DSA) PVC figure on the desk of one of the kids,in the classroom scene,when all their things are confiscated by the teacher.
A poster for the movie Blood Diamond can be seen when the two cops are chasing Tsuin.
The hot sauce that Manatsu Mukai puts in the person's beer is called Spicy Habanero.
A CD Soundtrack of Kite Liberator was released on Apr 22, 2008 by Phantom.