I don't know whats your "hype" about McD in japan. Tried it (my rule is: McD once in every country ) - it was "ok", but that was it. I prefered it in Korea and China over japan (not just cost wise, but also taste-wise)

Especially the french fries in japan were totally tasteless. And half-cold. Urks. The burger was soso..

But then, in a supermarket I could get a ready-to-eat tasty chicken stuff (or whatever) meal that cost me 150 Yen or so (billed by the gram), and which was more fulfilling than the junk from McD.