Well of course there's the most famous alcoholic beverage in Japan... Saki. But as for Japanese beers, I know there's Asahi (I think it's called). And I know of Sapporo. But a quick google search shows many think Suntory Malt is the best. I've never heard of it.
I lived in Japan a while back. Ice cold Kirin Lager was my favourite beer - certainly compared very well to any I've enjoyed on the other four continents.
Sake is wonderful with a Japanese meal. It's often served warm out of a beautiful porcelain or pottery container with small, delicate cups to match. At one of the restaurants I miss most, we drank it cold out of a square wooden box filled to overflowing - delicious and refreshing in warmer weather.
Like wine, sakes ranges from the rough - what we would have called "plonk" - to much finer, smoother qualities.
O-cha, Japanese green tea, is served (hot) with most meals.