I have just started working with our Japanese counterparts and, while they give the Americans some slack, it has been established that honorifics are used. Apparently, I will start by using Lastname-san and eventually move to Firstname-san. Can anyone give me any sort of guidelines on when to use what? Especially in a professional setting. Any other hints on behavior would also be appreciated. zunger, sdragon, doublefeh, hansandersen?