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Aug. 25 (UPI) -- The Japanese film Isolated, which screened Sunday at Big Bad Film Fest, is a relentless yakuza action film that remains focused as it builds exponential challenges for its hero.

The movie opens with Tamura (Yoshiki Yamaguchi), a yakuza lieutenant, searching for his kidnapped boss, Renji Himuro (Yasukaze Motomiya) in a factory. A series of hit men stand in Tamura's way as he mows through the building looking for Renji.

Isolated throws the audience right into the action. It explains the plot along the way in flashbacks but keeps it simple.