That depends on what you mean by "great service". As an Australian living in Japan, I was unfamiliar with tipping until a recent trip to the US. And the thing that surprised me even more than the bizarre idea of me having the power to underpay a worker despite them doing a perfectly good job (that would be illegal in other countries), would be the idea of "great service". Apparently in the US, great service consists of being nagged constantly to remind you that he server exists and needs a tip. Great sevice in Japan however means leave me the fuck alone and let me enjoy my meal in peace.