Filename Threads - Mokujin

I actually don't think they are; I just looked it up, and according to the Yu-Gi-Oh! wiki, the only comparison made as a possible inspiration for Inpachi is the aforementioned Tekken character himself. Furthermore, the etymology of the name "Inpachi" is just a Japanese pun on the number 18, while "Mokujin" simply translates to "wooden person".