Question: is kingdom hearts a spin off of final fantasy

Answer: No, Kingdom Hearts is a crossover of various Disney settings based in a universe made specifically for the series. The series primarily centers on the main character Sora and his journey and experiences with various Disney, Final Fantasy and The World Ends with You characters, whilst stopping the various incarnations of the primary antagonist Xehanort throughout the series. All characters original to the Kingdom Hearts franchise are owned by The Walt Disney Company.