Why didn't the anime "Slam Dunk Master" continue to be serialized?

At the beginning, after the serial of Slam Dunk Master suddenly ended, after the finale "The Battle between Xiangbei and Shanwang Industry" 10, the story of the protagonist Hanamichi Sakuragi and others was created on the blackboard, which was once a much-told story. The cartoons on the blackboard have been around for several years. Many readers are still obsessed with his amazing works, hoping that Slam Dunk Master can launch the second part, and eager for Inoue Takehiko to re-create the passionate works of young readers.

But in fact, Inoue once used a painting to lay the groundwork for the later plot development. After all the cartoons were finished, Inoue once painted the "Ten Days Later" of the national competition on the blackboard in the classroom. In the content of Ten Days Later, he once showed two parts. First of all, Mitsui trained hard for the winter trials. In another paragraph, coach Tian Gang from Lingnan and coach Gaotou from Hainan discuss the list of national players.

For Japanese high school students, there are three major basketball events in a year. They are national competitions in summer, national sports competitions in autumn and winter trials in winter. Different from the national competition and winter trials, the national games are based on counties. In other words, the top four teams in Kanagawa, namely Xiangbei, Lingnan, Hainan and Xiangyang, will be able to form a joint team to attack in the name of Kanagawa Prefecture.