One of the best things about living in Japan for the last several years is the the food and bar service. No tips, they won't accept if you try and will insulted if you attempt. They never come bothering you at your table. When you want service, you either yell (not considered rude) at them, or some places have a call button you push. Best service in any country I've been in.
Can't say the same for service in the states. Hit or miss depending on where you go, but I guarentee you are much more likely to get a rude, disinterested server in the US than Japan.