|Voice (E):||Kevin Michael Richardson|
|Voice (J):||Daisuke Gouri|
|Birthplace:||Claims to be Japanese (denied by Japanese government)|
|Height:||5'10" (179 cm)|
|Weight:||176 lbs (80 kg)|
|Family:||Oldest son / Kazuya Mishima
Grandson / Jin Kazama
Pet / Kuma
Father / Jinpachi Mishima
Adopted son / Lee Chaolan
Youngest son / Lars Alexandersson (illegitimate)
|Type:||His body (though he equips gauntlets)|
|Discipline:||Mishima Style Fighting Karate|
Bio: Soulcalibur IIAfter completing his mountain training with his pet bear, Kuma, Heihachi stopped by at a hot springs resort to recuperate. There he encountered an ancient metallic fragment. According to old picture scrolls, this shard was a piece of Soul Edge, a notorious sword from medieval Europe. Grabbing the fragment in excitement, he accidentally cut his fingertip; and after a moment of dizziness passed, Heihachi looked around at his surroundings. A feeling of uneasiness washed over him as he was no longer at the resort he had been at just a few moments ago. He was stunned, but nevertheless remained collected.
After he wandered for a while, he concluded that he was no longer in modern day Japan. He had somehow traveled back in time to the later sixteenth century. Though he wanted to return to his own time, part of him was trembling with anticipation of what was about to transpire.
He knew the history behind the fragment, which was ripe with battles between warriors fighting for its possession. Now, he was right in the midst of it all. He eventually decided that finding and obtaining Soul Edge was the perfect challenge to test his strength and proceeded to seek it out.