As far as I can tell, this patch will translate that pesky Japanese title screen into something more familiar. I wish I could tell you more, but after spending about an hour being terrible at the game, the frustration got to me and I gave up hope that there might be translated text at the end. Plus, the readme doesn't really go into details, but considering the nature of the game that's fair enough.
http://akatranslations.9cy.com/
Altered Beast aka Juuouki
Notes:
Rom Name: Juuouki (J).nes
System: NES
Patch: beastv10.zip
Version: 1.00
Translation by: akadewboy
This is a simple translation that I made just for fun, and to bring attention to anyone that didn't know that Altered Beast was actually released on the NES. I always thought it was only released on the Sega Genesis.