[utsu]

One more thing to consider. If you want to color your hair blond before you come to Japan, how are you planning to touch up the roots once you're here? Depending on your hair type, getting a hairdresser to do it here might not a be a very good idea, because the dyes they use here are a lot harsher. Remember, Japanese hair is a lot thicker and coarser and the blond dyes sold in this country reflect that.

And even if you want to color your hair yourself, blond shades of Feria, Excellence or whatnot are not easily available (or not available at all as is the case in my town). I get my friends to send them to me.