Tetsuya Mariko (born July 12, 1981) is a Japanese film director. Mariko was born on July 12, 1981, in Tokyo , Japan. He began making short films while at Hosei University . He produced The Far East Apartment in 2003 and Mariko's 30 Pirates in 2004, which won the Grand Prix at the Yubari International Fantastic Film Festival. He made Yellow Kid , his first feature-length film, while a graduate student at the Graduate School of Film and New Media at Tokyo University of the Arts . He won the New Director Grand Prix at Takasaki Film Festival and the New Directors Award at the Japanese Film Professionals Awards for this film.

In 2016, he won the Golden Leopard for Best New Director at the Locarno Film Festival and the Silver Balloon at the Three Continents Festival for his film Destruction Babies. In 2019, Mariko received Nikkan Sports Film Award for Best Director for his film Miyamoto.