If you're looking for manga similar to Mahjong Soul Pon☆ Special, you might like these titles.
Miiko is a girl with a problem. She's passed all the tests and become a Mahjong Pro, but she stinks at Mahjong! She was starting to even hate the game, but then she runs into a man who used to be a Top-Tier Mahjong Pro named Namidame in a parlor and asks him to teach her how to play right! The two strike a connection and Namidame vows to help Miiko work her way up to the top leagues.
Tenma is a Middle Schooler who loves playing Mahjong. He doesn't know exactly why, but the freedom it brings him fills his chest with pride. One day, his friends run into some trouble with University Students from Kantou, and it's up to Tenma to save the day!