Japanese sake(日本酒)

I like drinking alcohol. What I am basically used to drinking in the UK is beer and wine . Likewise, I drink Japanese sake in Japan. When I was there, I was familiar with it. Thus, I miss Japanese sake very much. I do not mind not to eating Japanese food abroad, though  I really would like to drink Japanese sake.
Japanese sake is written as 酒 in Japanese. Sake means alcohol in Japanese. Therefore, Japanese people do not call them  Japanese sake. Japanese sake can be categorised as Shotyu(焼酎) and Nihonsyu(日本酒). Those types of alcohol are normaly made of rice, sweet potato or wheat. They are fermented drinks that each sake brewery seems to have  an original technique to make them . In other words, there are many different tastes of sake. Those beverages are normaly supposed to be drunk with water and ice cubes, hot water and on the rocks. Shocyu is more popular than Nihonsyu. I do not know why. I have not thought deeply about it.
If you go to Japan, try them out at night in a restqurqnt / pub. I really recommend to drinking them.