Heihachi Mishima was created in 1994.
because kazuya sold his soul to the devil gene,Jin was his son so he got it and heihachi, nothing happend to him so he didn't get the devil gene from jinpachi.
Jin got his father's (Kazuya Mishima) Devil Gene.
Jinpachi is the father of Heihachi, grandfather of Kazuya, and the great grandfather of Jin. Although Jinpachi was the founder of The Iron Fist Tournament, Heihachi locked him up in the Mishima Zaibatzu dojo, and when Jack 5s blew the place up, Jinpachi became free and reopened The Iron Fist Tournament with Jinpachi at the top. Also, he was the first to receive the devil gene. Although i don't know why Heihachi didnt receive the gene.
Jin, as he beats Heihachi, he turns into Devil Jin and flies out of the Mishima Zaibatzu Compund with one flap of his devil wings.
Mishima
His father is Kazuya Mishima. Jin was raised in the mountains by his mother Jun Kazama because she wants to keep Jin away from Kazuya since he possesses the Devil Gene. When Jun was attacked by ogre, she ordered Jin to go to Heihachi Mishima, his grandfather, for help.
to kill kazuya mishima and heihachi mishima well while kazuya and heihachi were fighting the jack 5`s kazuya left the temple and let heihachi die on his own!
Asuka Kazama, Heihachi Mishima, Kazuya Mishima, Lee Chao Lan(adopted), and Jinpachi Mishima
Im pretty sure that Kazuya was thrown off a cliff by Heihachi, and received the devil gene in the extinct volcano that he was thrown in, then it spread towards Jin as well, but Heihachi didnt get it, so that's why he was looking for them Then why is Jinpachi like that then?
He's the son of Heihachi Mishima, the long time CEO of a powerful worldwide conglomerate Mishima Zaibatsu, and grandson of Jinpachi Mishima. He has a foster brother, Lee Chaolan, who was adopted by Heihachi Mishima, and also a half brother, Lars Alexandersson, Heihachi's illegitimate son. Most importantly, he is the father of Jin Kazama, through a relationship with Jun Kazama.
Unknown if Heihachi Mishima is coming back from Tekken 7 because, however, the person who play Heihachi Mishima in the Tekken series name Daisuke Gori who died in January 17 2010 (aged: 57). However, it is unknown if him and the character died with him though. Or probably a new voice might replace Heihachi in Tekken 7 as well.