The Silver Case had a crossover with the Detective Saburo Jinguji series, known in the west as “Jake Hunter”, specifically with the 2002 Playstation 2 release Innocent Black.
According to this mixi and 5ch threads, the game contains four crossover scenes, which have been recorded and translated in the following video. Thanks to Jolovey for the transcription, for translating the final scene and for general assistance.
