Wait i just know this
https://en.m.wikipedia.org/wiki/Jap
lol i’m a different person than the person that posted this so i hope it’s fine that i leave a link but here, https://www.japan-talk.com/jt/new/is-the-word-Jap-derogatory
Once again i’m a different person than the original poster of this comment but i hope me leaving a link or two is ok,
https://www.japan-talk.com/jt/new/is-the-word-Jap-derogatory
also while this one doesn’t include the j slur it has others that are used often(also less often) against asians including Japanese people:
http://www.rsdb.org/
it’s kinda annoying as an asian to see comments where people say j@p as a shorten word for japanese, even when you tell them it’s a slur they get defensive. it’s okay not to know, however when you take in asian entertainment like manga,, you should really educate yourself so you don’t accidentally say a slur or something offensive to asians. it’s just nice to know that you can enjoy sometime without being ignorant about it.