It was one of reasons that I had been studying Japanese so hard I have been doing business with Japan for around 15 years and almost every day I am using Japanese language in e-mail and on phone 。I am sure I do it very well 。however ，when I graduated from college ，it wasn't like this and even now I still remember a bad experience very clearly 。As you know ，Japanese language also has dialect like Chinese language 。for example ，Osaka dialect ，Hukuoka dialect。pronunciations are absolutely different 。One day ，I had a mistake in business so my Japanese customer got angry with me 。In fact，that is not only all my responsibility，at that time ，my Japanese was not good， When I was trying to explain in Japanese ，something amazing happened ，he got more angry after I had explained it and suddenly he was speaking with a strong accent ，wow ，my god ，what are you saying ？I didn’t understand him but the worst thing is that I just undertook a few words that was not good words ，like stupid ，foolish 。I got angry too and even I couldn't say words 。after that I swear I must study Japanese language very well and at some point I could discuss with Japanese people when we have trouble in business 。Just now I do it