Invisible Waves (Thai: คำพิพากษาของมหาสมุทร) is a 2006 crime film by Thai director Pen-Ek Ratanaruang, with screenplay by Prabda Yoon, cinematography by Christopher Doyle, and starring Tadanobu Asano – all people that Pen-Ek had worked with on his previous film, Last Life in the Universe.

He works for a Thai restaurant in Hong Kong and has been having an affair with Seiko, the wife of his boss, Wiwat, who orders Kyoji to poison her.

Kyoji then boards a cruise ship, and is given a small, dreary cabin belowdecks, where nothing seems to work properly.

Eventually, the ship reaches its destination, Phuket, Thailand, where real life-or-death adventures begin for Kyoji as he starts to put the pieces together about what he's done.

Invisible Waves had been announced as Thailand's entry for Best Foreign Language Film at the 79th Academy Awards by the Federation of National Film Associations of Thailand, but was then withdrawn and replaced with Ahimsa ... Stop to Run, which upset the Invisible Waves production company, Five Star Production.