This ought to be common knowledge: the term “Jap” is derogatory. So please, my friends, stop using it, be it to prefix words or to name them in general. Use “Jdrama” or “JPN” instead, or say “Japanese” in full.

If you’re not convinced, perhaps you should read through this forum thread. From what I’ve skimmed of the first few pages, the following points were made:

• Many native Japanese do find this term offensive. Increasingly, awareness of the racism of the term is also on the rise, and many non-natives find it offensive.
• It can be seen as a “parallel to the “n word” for people of African descent or “gook” to those of Vietnamese and Korean descent”. Although it does not have as severe a connotation as it’s parallels, its usage should be avoided.
• Older Japanese (and non-natives) are more likely to take offense. This is due to the fact that they lived during the WWII and post-WWII period.
  

  back in WWII, propaganda against the japanese was everywhere…
  so they had things like “Kill the J**s” etc… sounds more powerful than using the word japanese.. single syllable easier to remember and pronouce too…can scream the word out too when delivering a propaganda speech… dun think it would be as powerful if you had shout the word “japanese”

  I just want to say that the use of the term “jap” in pretty much any context is almost criminally offensive in the Japanese American community I belong to. This is because I live on the west coast and many of the people who were rounded up and thrown in internment camps during WWII are still alive here. While it is true that the term may be used on very rare occasions by those of Japanese decent it is still considered derrogatory and is only used by those people who were actually alive during the war. We, as a community, have tried to eradicate the use of the word rather than incorporate and assimilate it to take the pain out of it.

I hope you’re convinced.