Just like one of those mega-selling manga series, Ring ni Kakero has proved its demand to its readers. Also, having adapted into 4 great anime seasons is enough to cover all the 25 volumes of its manga. Masami Kurumada has made a good job plotting the story line where every reader typically a sports fan would make a deal on every manga released.
Right before the era of the new manga boxing sensation Hajime no Ippo, there was Ring ni Kakero. Definitely, no one would dare to scrape some difference between these two masterpieces. All 4 seasons of its anime adaptation ran with a total number of 36 episodes, pretty short right?
But yeah, having the fact that the anime adaptation is quite short, I wanted to see another season for Ring ni Kakero. A season 5 or Ring ni Kakero 5 is a must for its fans. You know, loyal fans would always crave for a bonus season.