Hero is a 2007 Japanese feature film based on the 2001 Japanese TV series of the same name. The original series spawned a 2hour TV special in 2006 which followed the main character, Kuryu, five years later. That special sets up the leadin for the 2007 feature film.
A sequel feature film, also titled Hero, was released in theatres in July 2015. The film follows Kuryu and the cast of the 2014 TV Series and features the return of Amamiya, who was inexplicably absent from the second TV series.The film begins six years after Kuryu Kohei was transferred to Ishigaki Island in the TV series finale. We learn in the interim that he has since been transferred to Sapporo and then to a brief tenure in Yamaguchi Prefecture the events of the 2006 Hero TV Special. Kuryu Kohei returns to the same Tokyo District Prosecutors Office from the TV series and reunites with his old workmates. The events of the film takes him to Korea, wraps up plot threads from the TV special and allows Amamiya and Kuryu to rekindle their relationship which had been in limbo since their date at the 2002 World Cupyears. ........
Source: Wikipedia