[officeoffice]

I'm gonna be going to Japan next year, and I'm thinking about bringing electronics such as my DS charger, my hair straightener, my ipod charger and also my hair curler to Japan, but I'm not so sure about the difference of voltages between the US and Japan? I know in US we use a 120v, and in Japan they use 100v. So it'd be a problem to plug in any devices from the US? Or would they be okay?