Too busy indeed. The Japanese font is unnecessary, unless you're either actually providing content aimed at a Japanese audience, or trying to be Japanese (for the sake of humor, more often than not). It doesn't seem like it's either of the two, so I think the logo would be better off without it.
The square thing, I don't really get. It just seems like a pointless ornament to me. The dot on the I does look like a G. May I suggest you draw something more spiral-like - the sense of motion it gives off should better accentuate the company/team name.
Putting some color in would be nice as well. Maybe some warm or cool colors, I'm not sure which. Play around with it more, I guess. It doesn't have to be really colorful, but I think the plain black's a little dull.