It hasn't been made available to Australians yet, but if you can access the US version of Steam then you'll be able to watch the first four uncut seasons.
Thing is, it costs a bloody fortune.
The listing appeared on Steam on the weekend, and while Australian accounts are blocked from seeing the store listing if you use this link you'll be able to see not a Naruto game, but the bonafide anime.
Well, Naruto Shippuden anyway.
At the time of writing, it costs $US1.99 for each episode individually. If you're so inclined, you can purchase episodes in a bundle, much like you would a DVD. There's 17 bundles all up: four for the first season, five for the second, four for the third, and four in season 4.
Each of them cost fractionally over $US20, but we'll round off the figure for simplicity's sake. So if you wanted to watch a couple of hundred Naruto Shippuden episodes on Steam, it'd cost you just over $450.
And there's no refunds on that, by the way.
Alternatively, you could just sign up to any anime streaming service and pay their comparatively minuscule cost. If all you wanted to do was watch Naruto, you could send $US6.95 a month to Crunchyroll for their premium service. Animelab costs the same. Hell, if you don't mind watching in potato vision with some ads and English subtitles only, Animelab's free service will probably get you there.
Hell, even buying DVDs is better value. You can get the Naruto Complete Collection from JB Hi-Fi for $380, with delivery for another $1.69.
Yeah, no thanks Steam.