If anyone's interested, here's an ips file of the translation that several of you helped my with in this thread. It's for a Japanese Sega Mega Drive puzzle game called "Shi Kin Joh". It's actually a very fun game.
I only did most of the "sub" menus (which is about half of the total text in the game). It makes the game much easier to navigate for those of us that can't read Japanese text.
It looks like most of the other text/menus are compressed, so I'm not sure if I'm going to tackle that or not.
http://codehut.gshi.org/ShikinjohTranslation.zip