The Fandom Post is reporting that the first 12 episodes of the Ashita no Joe 2 anime are now available for streaming on Amazon Prime. The episodes are streaming with their original Japanese audio with English subtitles.
The series ran for 47 episodes when it was first broadcast back in 1980 with TMS working on the animation. This followed the 79-episode series that ran a decade prior that was based on the 20-volume manga of the same name.
The story of Ashita no Joe is described as:
Joe, one of the top ranked boxers in the world, no longer has the yearning or desire to enter the ring again after killing his previous opponent by landing a wicked left jab to his temple. His confidence and competitive spirit is restored when he decides to overcome his fear by facing the uncrowned king from Venezuela, Carlos Rivera.
Source: The Fandom Post