I have the arcade version of Genpei Toumaden on the Namco Museum on PS1.
I can't decide whether or not I like that one or the X68000 port the best. X68K has all those hidden levels that were dummied out of the arcade release... but the PS1 is in english, and has that hilarious glitch that lets you kill the biwa player. I'd say it's a toss-up.
Some helpful tips:
Continues are useless.
Milk the enemy generators for all they're worth. You'll need the Zeni to purchase sword power-ups and health restoratives.
Don't mash against the earlier bosses, you lose too much of your sword gauge that way. You can't afford to be careless with your sword strikes until later in the game.
Mash the jump button to get a slight boost at the peak of your jump (only applies to PS1? I forget)
Certain fights against Yoshitsune (laughing dagger-throwing guy) can be skipped. When he first appears, turn around and crouch down. If he performs a rolling slash, let him pass over you, stay facing him, hold the attack button, and proceed to moonwalk all the way to the torii.
If you have 80 Zeni, you can buy your way out of hell. Just hop into the pool of blood near the beginning of the stage. Sure beats trying your luck with the treasure chests at the end.
Did I mention continues are useless?