I am...
Telling someone your name is probably the easiest thing to do in Japanese. To do so, all you have to say is your name, and "desu" after it. For example, "Peter desu". Desu, a particle, doesn't translate very easily to English, but its definition most closely resembles "it is". However, "desu" can be used in many other ways. For example, if you say "Konpyuta desu", the subject shifts from yourself to what you may be referring to and the phrase can be translated as "This is a computer".