Listen to Kokichi, he knows what he's talking about. Japanese is very easy to learn in the speaking/listening department. I would go as far as saying it's as easy as Spanish. Reading/writing is a whole different story. What makes Japanese hard is the Kanji. Kanji is the Chinese form of writing. Some 2,000 characters must be learned in order to be fluent at reading Japanese/Chinese. While Japanese has it's own alphabet, the Hiragama, it's mostly used as an extension to the Kanji.
For me, I started learning with Pimsluer(sp) audio CDs. It was a great way to get introduced to the language. I would highly suggest it for those who don't have any Japanese classes available in their area. It's a bit expensive, but you can get them used for pretty cheap on Amazon or Ebay.
But that won't get you anywhere close to reading/writing, which is what you're going to need if you want to import Japanese games. For that, it would be better to find a class. You're going to need a structured method to learning it.