Big Man Japan is a 2007 Japanese superhero mockumentary written and directed by and starring Hitoshi Matsumoto. It follows Masaru Daisato. Daisato is an otherwise normal Japanese citizen except for an inherited ability to grow to a height of approximately 30 meters in response to the application of high voltage electricity.
As both his father and grandfather before him, Daisato has accepted the duty to protect Japan against various giant monsters while working for a sub-division of the defence ministry called the Ministry of Monster Prevention.
Despite his great powers, he increasingly finds himself mocked by his fellow citizens while struggling under the burden of living up to a heroic lineage that increasingly overshadows his own mediocre accomplishments as a monster fighter.
To further complicate matters, he is deeply estranged from his own wife and child.
By the film’s end, his failures and doubts reach a hallucinogenic apotheosis!