No Regrets for Our Youth was Akira Kurosawa’s fifth film as a director and his first post-war film. It is based on the 1933 Takigawa incident when Kyoto University professor Yukitoki Takigawa was suspended and later fired due to allegations of teaching Marxist philosophies. It was also inspired by the fate of Hotsumi Ozaki, a journalist who worked as a spy for the Soviet Union and was the only person to be executed for treason by the Japanese wartime government.
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The only Blu-ray release of the film is a Toho release which comes without an English translation.
When it comes to English-friendly releases, as with most of the other early Kurosawa films, No Regrets for Our Youth is available only as part of Criterion (US) and BFI (UK) DVD box sets. The BFI is slightly blurrier than the Criterion, but in the end there is quite little difference between the two. No extras are available in either.