Just to clarify, do you mean that you have to get a Japanese driver's license (to do some kind of work, or to get by in daily life)?
Do you already have a license and you're trying to explain that you wouldn't be able to get by without it?
When you say "in this country" (I'm assuming that "this country" is Japan) do you mean that it doesn't have to be a Japanese license (i.e. it could be an international license or something)?
Who are you speaking to or what is the context that you want to say this?
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You don't have to answer all those questions, but there a couple of different ways to say this and it's hard to say what phrasing would be most appropriate without knowing a bit more about the context.