the language is tricky if you plan on using honorifics, which basically means understanding who you are relative to the person you're talking to and addressing them accordingly, as in, whether they're older, younger, same age, or whether they're higher or lower on the social/corporate ladder or all these sorts of things, for example when you talk about your own wife you say Kannai, but when it's someone elses it's Okusan, and these sorts of things.
The western equivalent would be to simply speak politely, but it's not so fully ingrained in the language like it is in Japan.