Okubo rhymes with:
dubow, kubo, lubow, pinatubo, rubbo, abo, albo, arbo, archambault, archambeault, balbo, barbo, baribeau, baydhabo, benbow, bibbo, bimbo, bobbo, bobo, bonobo, cabok, capalbo, carbo, clabo, cobo, colombo, columbo, corbo, cumbo, curbow, debo, debow, denbo, denbow, dolbow, dubow, dumbo, falbo, galbo, garbo, gebo, gilbo, globo, grabow, gumbo, gumbo-limbo, hanbo, hobo, ilbo, jacobo, jumbo, kerbow, kolbo, kubo, labo, labow, langbo, leabo, lebo, lembo, limbo, lobo, lubow, mambo, mancebo, montalbo, mumbo, nonturbo, oboe, palombo, palumbo, picabo, pinatubo, placebo, pombo, rambo, rambow, rebo, robo, rubbo, sabo, sambo, scerbo, sebo, shambo, skibo, sorbo, stumbo, szabo, tambo, tebo, thabo, thibeault, toyobo, trumbo, turbo, turnbo, turnbow, ybarbo, zambo
Okubo sounds like:
o'keefe, o'keeffe, occupy, ojibwa, okabe, okeechobee, okeefe, okeeffe, okpo, osby, oshaf, ossify, ouseba, oxbow