Tip-off is now. Go read.
The only legitimate, publisher-approved way to read Slam Dunk Volume 1 for free is through digital manga services that offer a or first-volume promotion . slam dunk manga volume 1 free
With its engaging storyline, memorable characters, and intense basketball action, Slam Dunk has become a must-read for anyone who loves sports, drama, and inspiration. Tip-off is now
: You can often read a substantial portion of Slam Dunk Vol. 1 for free through their "Preview" feature. Digital Library Services and intense basketball action
As for your search query, I couldn't find any reliable sources that offer the first volume of "Slam Dunk" manga for free. However, I can suggest some legal alternatives: