In Japanese the "regular" name for America is Amerika and is spelled in Katakana like this アメリカ. However Japan also uses the Kanji
which is pronounced Beikoku.
What does that mean exactly? Well the character on the right means "country", and the one on the left means "rice". So if you can put two and two together, you should know what that literally means. Doesn't make sense? Well when Japan first started interacting with the United States we used to ship them enormous amounts of rice as part of economic trade. Now it makes sense.