Japanese Style Alcohol, Japanese Alcohol, Sake
noun
You know that 日本 is "Japan" so when you add alcohol onto the end of that you have Japanese Style Alcohol (what's the big Japanese style alcohol that everyone knows? That's sake).
にほんしゅ
The reading for this is just the vocab 日本's primary reading plus the on'yomi you learned for 酒, put together.
父は平日は日本酒をあまり口にしない。
My father doesn't drink much sake on weekdays.
バーテンダーが日本酒を交ぜたカクテルを作りました。
The bartender made a cocktail that is mixed with sake.
日本にいる間に、たくさんのんでね。アメリカで日本酒を買うと高いですから。
You should drink a lot of sake while you're in Japan. It is expensive to buy sake in the United States.