You will need to search for user-created subtitle archives. Look for files with high download counts, user comments clarifying "best for Criterion rip," or those specifically noted as "retimed" for the 4K restoration.
To determine if subtitles are of high quality, a viewer can check for the following specific translation choices: harakiri 1962 subtitles best
Their translations are handled by experts in Japanese cinema who understand the historical context of the Tokugawa shogunate. You will need to search for user-created subtitle archives