Yoshikawa rhymes with:
ishikawa, nishikawa, fujikawa, ichikawa, ishikawa, morikawa, nishikawa, arakawa, fujikawa, furukawa, hosakawa, hosokawa, ichikawa, ishikawa, kawa, kurokawa, maekawa, matsukawa, momokawa, morikawa, nishikawa, shimokawa
Yoshikawa sounds like:
y's, y.'s, yack, yacko, yacos, yagi, yahoos, yak, yake, yakusa, yass, yasso, yasuhiko, yasuo, yasushi, yasuyoshi, yauch, yax, yazzie, yeakey, yeas, yeck, yeosock, yes, yeses, yeske, yessuey, yew's, yikes, yoak, yockey, yoes, yoga, yogi, yoichi, yoke, yokes, yokich, yoko, yokokohji, yoos, yoshi, yoshiaki, yoshihashi, yoshihisa, yoshikazu, yoshio, yoshioka, yoss, yossi, yous, youse, yoyos, yu's, yucca, yuck, yucky, yugo, yugo's, yugos, yuhas, yuhasz, yuichi, yuk, yukio, yuko, yuks, yusko