If you're looking for manga similar to Astekaizer, you might like these titles.
Tiger Mask (whose real name was Naoto Date) was a feared heel wrestler in America who was extremely vicious in the ring. However, he became a face after returning to Japan when a young boy said that he wanted to be a villain like Tiger Mask when he grew up. The boy resided in an orphanage, the same one that Tiger Mask grew up in during his childhood. Feeling that he did not want the boy to idolize a villain, Tiger was inspired to be a heroic wrestler.
Koitaro Samejima is a professional rikishi who, despite his love for sumo, has struggled with his small stature all through his career. Now, he is thinking about retiring, and he has 15 days to make the most out of it!
Momotaro is a masked wrestler and a descendant of his legendary warrior namesake. Combining the ferocity of pro wrestling with lighthearted gags, this manga knows how to make the wrestling ring exciting. Throw in characters based on famous figures from fables such as Kintaro and Urashima, and you have yourself a recipe for white-knuckle showdown!
An almost road accident victim loses his memory after being pushed to a street power line pole to save his life. Not knowing his identity he is compelled to stay at his savior's residence a gym and boarding house for female wrestlers until he remembers. During his stay he becomes his savior's manservant and the gym's referee trainee.
Professional wrestler Yamamoto Jingo just returned to Japan from a 5 year training trip in the US and Mexico, only to be greeted by his now defunct wrestling company: Yamato. He's come to find out that as soon as the president of the company passed away, the rival wrestling group "Teijitsu" took down Yamato. Jingo has now been forced to go seek revenge for the destruction of Yamato by challenging the Teijitsu president. One thing led to another, and now Jingo has been half-forced into working under Teijitsu as the new wrestler from Brazil: Agnes Kamen.