Ping Pong (2002)

Both movies about Ping Pong/Table Tennis

Both are sports related movies, that have comedy, "action", and friendship.

Both movies focus on an "unlikely" sports activity and shenanigans around it.
Both movies feature a team, but in Ping Pong supporting characters are more in the background.
In both movies Naoto Takenata plays the mentor figure.
Both movies underline the value of friendship.

Both of these movies have fresh, funny and youthful writing and characters that give you a sneak peek into a very specific niche of nerd-dom. :) Both movies are quirky and fun but have positive, warm messages overall.