Thanks all. Rags and toothbrushes I have. Can't say whether or not I can get Simple Green over here in Japan though. I'm also always wary of putting these solvents near my bike for fear of degreasing the wrong areas. I'm not knowledgeable enough yet in the mechanical department to take apart components (e.g. BB) and give them a good regreasing. I'm learning though...
Dizzy, thanks for the link.
I'm always paranoid that I'll do some damage to the drivetrain/bearings when giving my bike a clean. Seeing other people's approaches to how they clean their bikes are always of interest.