Jap rhymes with:
app, cap, capp, chap, chapp, clap, clapp, crap, dapp, entrap, flap, frap, gap, gapp, giap, hap, happ, happe, kapp, klapp, knapp, krapp, lap, lapp, lappe, map, mapp, nap, napp, pap, papp, rap, rapp, rappe, sap, sapp, schapp, schnapp, scrap, shap, shapp, slap, snap, snapp, stapp, strap, tap, tapp, tappe, trap, trapp, trappe, unwrap, wrap, yap, yapp, zap, zapp
Jap sounds like:
jab, jabah, jackoby, jacob, jacoba, jacobe, jacobi, jacobo, jacoby, jaffa, jaffe, jaffee, jaffey, jakab, jakob, java, jeb, jeep, jeff, jeffe, jeffey, jeffy, jehovah, jessop, jessup, jesup, jib, jibe, jif, jiffy, jive, job, jobe, joffe, jojoba, jopp, josef, joseph, josepha, jovi, jozef, juba, jubb, jujube, juppe, juve