There is a whole lot of desu です going on.
It is pronounced as if there is no letter u at the end: DES.
It means “am, is, are” depending on the subject, the person or the thing. It ALWAYS comes at the end of a sentence in Japanese.
Oh, hang on a minute…
not all sentences in Japanese end with “desu” of course;
just as all sentences in English don’t have the word “am”, or “is” in them.
Let’s have a look at these examples:
えき です。eki desu. (It) is (the) station.
でんしゃ です。densha desu. (It) is (the) train.
たぬき です。tanuki desu. (It) is (a) raccoon.