炭酸（たんさん）- Carbonation

 Have you ever been asked in a restaurant if you would like sparkling or still water? 

I'm sure many of us have enjoyed carbonated "fizzy" drinks before in sparkling water or sodas or other soft drinks at least once in our life! The name for fizzy carbonation in many of the sodas we love is called "炭酸 (たんさん)" in Japanese!

Sparkling water is called "炭酸水 (たんさんすい)"!

I learned this because I found out one of my Japanese friends can not drink carbonated drinks.