no not for arcade mode
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.
Beat the game with every character.
Devil/Angel. To do so, unlock all characters, then play through with kazuya
To unlock all characters in Tekken Tag Tournament, you need to play the Versus Mode a total of 15 times. After completing these matches, the remaining characters will become available for selection. Note that this refers to the original Tekken Tag Tournament, not its sequel.
Ogre was introduced in Tekken 3, and he returned into Tekken Tag Tournament, and Tekken Tag Tournament 2. Also, he was already unlocked in Tekken Tag 2.
Beat the game with the original characters in order to unlock him.
you unlock jinpachi can in tekken 5 (dark resurrection) but in the normal tekken 5 you cannot unlock him.
Kazuya Mishima is the main character of Tekken 1 & 4, Heihachi Mishima is the main character of Tekken 2 (Although the events in Tekken 2 revolve around Kazuya's actions), and Jin Kazama is the main character of Tekken 3, 5, & 6.
There is a patch called Street Fighter X Tekken 1.06 that one can download to unlock other characters. Run the setup program and install it and copy the file, const.lua under the StreetFighter boot game folder.
Tekken Tag Tournament is set after Tekken 3, but it is non-canonical. It has all the characters from the past 3 Tekken games.
Scenario Campaign. As you go through, you will unlock characters. play as them in the arena mode