Big Japan is a four-piece indie rock band from Los Angeles, California, United States with Nathanial Castro on vocals and guitar and Brad Babinski on bass. Actors Adam Brody and Bret Harrison play drums and guitar, respectively. The band only performs, writes and records sporadically given Brody and Harrison's unpredictable acting schedules.

Their first band name was Steven's Team, named after the movie The Cable Guy.
Big Japan's first release, Music for Dummies, was digitally released through Nightshift Records on August 23, 2005. This CD originally titled "Music for Dummies" was changed to "Untitled" thus the limited number of CDs printed have become collectors items. The band planned to release an EP in early 2007 (as announced in Big Japan's myspace) however said EP was not realeased.
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