[Starairi]

I'm going to Japan for the first time in three weeks, and I want to bring things like my DS, camera and such. The problem is that here in Norway we have the type C plugs and in Japan they use the type A. I have no clue when it comes to electronics so I need some help with this.

Do I need some kind of adaptor/converter of some sort? Will is be okay when my electronic things are 250V and there is 100V in Japan?