ill provide some context on Slam Dunk since you refuse look into what Slam Dunk is.... It is not just a basketball anime. It is the premiere shonen sports manga. In the 5 years and 8 months (I looked it up, October 1990- June 1996 )it was a part of Shonen Jump ( the biggest manga magazine in japan. I looked) it was a Avatar level phenomenon. It's sold 170 volumes. The only other series that have sold had been ongoing series for at least twice as long ( with one piece still running strong after 25 years
Added the Wikipedia link in case people wanted to check
https://en.m.wikipedia.org/wiki/List_of_best-selling_manga