Four in Japanese, "Shi" is the same word as death.

You may have heard in many anime, "ShiNe" or "Die!"
"Ne" is not adding to the word, it is a sentance ending meaning, don't you think?, don't you agree? You should of course."
So, it might be more literal to translate "ShiNe" as "Go Die" or "Just Die"

Similar meaning in China
where is is bad luck and death (usually of family members)