Theres two ways to do this. First one. Complete the game with every Charectar, Get Tekken Lord Rank with every charectar, then complete tekken dojo with every charectar.
That way as far as i know has not been proven yet.
Second way. Get custom firmware for your PSP, Download and install cwcheat, enable cheats and select: "P1 as Jinpachi (Human)" or "P1 as Jinpachi (Demon)"
The Second way DOES work, the first one many people claim they have or can do it. Try which ever you feel like.
You can't play as Jinpachi in Tekken 5.
You can unlock jinpachi by using cwcheat
you unlock jinpachi can in tekken 5 (dark resurrection) but in the normal tekken 5 you cannot unlock him.
you can't unlock him in tekken 5
You can't unlock jinpachi in tekken 5. He's usable if you chance upon him picking random characters. He is unlockable in tekken 5 dark resurrection, though.
Jinpachi is unlockable
yes, it is possible there is a cheat on www.gamespot.com that allows you to unlock jinpachi
NOPE did u no u can play jinpachi on tekken 5 dr in PSP
You can't really unlock him, there seems to be a cheat for him, but not on the original game itself, so you can't really.
on the psp version you can unlock him by using cw cheat(google it), on tekken 5 for ps3, beat the game once with anyone
he die
Jinpachi Mishima is a playable character in Tekken 5, with a cheat device, but you don't need it in dark resurrection.