Here's what rhymes with ryokai.
guy chi quae kai by my high why die lie thy y buy cry sky tie vi hi shy sigh bi bye dye fi hy nigh pi pie thai thigh vie dei ly psi rye ty wir awry hai lye mai muy nai wry cy fy lai luy mei sy tai thei wai phi aquae apply dry try fly spy fry ply sly pry tri trie pri untie sty amebae stye lanai slier supply reply deny rely alkali defy goodbye alibi ratify unify belie decry lullaby amoebae edify overlie ramify bonsai deify firefly ossify retry spry turfy scurfy ripply overbuy thereby imply nearby occupy whereby clarify comply hereby modify nuclei classify verify certify glorify gratify notify purify underlie alveoli nullify pacify rectify falsify pupae terrify typify codify crucify descry liquefy mollify resupply triply blowfly calcify horrify reunify liquify overfly versify mummify prettify shanghai drachmai banzais yuppify identify justify satisfy multiply qualify specify signify testify butterfly amplify diversify fortify magnify samurai beautify solidify termini dignify mortify vilify acidify mystify stratify stultify ultrahigh vivify emulsify misapply petrify revivify stupefy scarify barfly hyperbolae vitrify beatify speechify dandify stimuli simplify quantify standby objectify oversupply personify dragonfly electrify preoccupy cumuli declassify refortify syllabify solemnify intensify indemnify demystify detoxify reclassify dissatisfy gentrify exemplify disqualify misidentify oversimplify transmogrify