Where to watch
Don't Know Why isn't on any streaming service in United States right now, but it's available in Japan. Streaming rights are licensed per country.
Cast · Directed by Grant Singer
More like this
Don't Know Why — streaming FAQ
Which OTT platform streams Don't Know Why?
Don't Know Why isn't on any streaming service in United States yet, but it's available in Japan. Streaming rights differ by country — switch your country in the header to see where.
Is Don't Know Why on Netflix?
No, Don't Know Why is not on Netflix in United States as of August 2026.
Is Don't Know Why on Amazon Prime Video?
No, Don't Know Why isn't on Amazon Prime Video in United States right now.
Where can I watch Don't Know Why for free?
Don't Know Why isn't streaming in United States yet, so there's no way to watch it free at the moment.
What is the OTT release date for Don't Know Why?
Don't Know Why hasn't started streaming in United States yet. Based on the typical 6–8 week theatrical-to-streaming window, we estimate it will arrive around December 14, 2017. This is a prediction, not a confirmed date.