The series began in arcades with Kotoba no Puzzle: Mojipittan in 2001, and has seen multiple sequels for several platforms, including the Game Boy Advance, PlayStation Portable and Nintendo DS.

The original Kotoba no Puzzle was designed by Hiroyuki Goto, who is well known in Japan for being able to recite pi from memory to 42,195 decimal places, making him the world record holder at the time.

Likely due to its strong usage of Japanese, the series has remained confined to Japan.

The Kotoba no Puzzle series was met with positive reviews from critics, being praised for its originality, multiplayer and addictive gameplay, with Kotoba no Puzzle: Mojipittan DS receiving the "Gold Hall of Fame" award from Famitsu.

Words' Card Game: Mojipittan) was made by Mega House under Bandai Namco's license and released in 2007.