Kisarazu Cat's Eye (2002)

In this drama based on basketball (and somewhat on the anime Slam Dunk), a Taiwanese national team basketballer.
Duan Chen Feng, whose world consists of his 2 greatest loves: basketball and his girlfriend, Xiao Xi. They find their perfect world shattered, however, when on the day of his most important match, Duan Chen Feng has an accident on his way to the competition, and paralyses Angel, who just happens to be the sister of Iceman, his biggest opponent since they were young.

To shoulder his responsibilty, Chen Feng leaves school and his basketball so that he can take care of Angel. Xiao Xi, who does not know the reason behind Chen Feng's leaving school and giving up his beloved basketball, is heartbroken and bewildered. At about the same time, Tai Zi, falls in love with Xiao Xi's plucky and determined character.

Friendship, baseball, comedy. If you're tired of romance & heavy genre, this is for you. More like a country childhood boys goofing around & play sports

Despite having different settings, both dramas have similarities regarding Japanese youth in the early 2000s and delinquency. They also share the same director (Kankuro Kudo), and a major part of the cast.

japanese boy gang type friendship themes in both. both shows are made my same author, similar humour. delinquents, yakuza, street life etc.

Both dramas are about a group of friends and their shenanigans. Both shows are comedy but they also have some serious moments!

Lee Jang Suk spent some time in a juvenile detention center for stealing wallets from unsuspecting strangers. After he gets out, he meets a sports agent, Nam Jae Il, who's trying to recover from a downfall in his career. Together, they work to achieve their dreams. Jang Suk dreams of becoming a K-1 Champion; and Nam Jae Il dreams of regaining his reputation as a top sports agent.

Comedy & sports & bromance. If you're tired of melo&romance, this friendship journey will brighten your day

IWGP SP set in Kizarasu Cats Eye's final episode. the main 5 cast from Kisarazu make a cameo appearances (Including Sato Ryuta, who appear on both show).