Maybe to prove you're a hardcore Japanophile nut? Why game companies don't get real voice actors for US dubs is beyond me. It would be so cool to have some game voiced by James Earl Jones, Michael J Fox, Cary Elwes, and Robin Wright (and since i mentioned two actors in it, why was there never a video game made based on the Princess Bride
).
When I saw the voice staff for Lunar: SSSC I fell over laughing. Vic really did pick up any cokehead he could find, just look at the guy who did Alex. I bet they paid him in oz. instead of $$$.
As far as Japanese goes, there's very few voice actors I really like. Maybe Okiayu Ryoutarou (Randius in Langrisser IV), Iwao Junko (Schelfaniel in Langrisser IV), Shiozawa Kaneto (Boser/Mysterious Sorceror Fealart in Langrisser I, II, IV and Ostracon in Emerald Dragon, too bad he died a few years ago), Kasahara Hiroko (Tamryn in Emerald Dragon). Probably Toyoshima Machiko (Sugihara Manami in Sentimental Graffiti 1&2 and Rozenshil-hime in Langrisser IV) too, she sings nice.
If you've ever seen seiyuu tryouts, being picked to be a seiyuu is a lot like begin picked to recieve placebo when you visit your doctor
My biggest gripe with Japanese voice acting is the women. It seems to be an on-going trend that it's "cute" to talk in an ear-shattering, grating, nasaly voice best exemplified by Megumi Hayashibara who's made mad amounts of cash doing the painful voices of many horrid sounding characters (only female Ranma, Lina Inverse and Lime come to mind right now but I try not to pay much attention to anime).
The truly aggravating thing is it's not even how the people's voices sound. They intentionally make those horrible sounds. Most of them have quite nice voices when they're talking like a human instead of a cat stuck in a blender.
And it's not like you can't be a sucessful, good voice actor without sounding that way. Hundreds have done it in both game, TV show, and voice-over alike. Amano Yuri was one of the better female voice actors that comes to mind from Yuu Yuu Hakusho (Yukimura Keiko's actor as I recall). 5th most important character in the story (though until the comics entered the ankoku buujutsukai arc she wasn't very prominent after the first couple issues).
Anyway [/rant]. A lot of times the Japanese voices of a game just aren't that much better than a "bad American dub". I can think of quite a few Japanese games with worse voice staff than ANY American dub (Princess Minerva comes VERY quickly to mind closely tailed by Lunar: MAgic School...)