九寸五分[kusungobu] dagger
弦楽五重奏曲[gengakugojuusoukyoku] string quintet
五つ[itsutsu] five
五つ子[itsutsugo] quintuplets
五悪[goaku] the five sins in Buddhism (murder, theft, adultery, falsehood and drink)

五音々階[goononkai] pentatonic scale
五戒[gokai] the five precepts (prohibitions against killing, theft, sexual misconduct, lying and intemperance)
五官[gokan] the five sense organs
五感[gokan] the five senses

お大事に[odaijini] take care of yourself
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
伊勢大神宮[isedaijinguu] the Grand Shrines of Ise
伊勢大廟[isetaibyou] the Grand Shrines of Ise
偉大[idai] greatness

医科大学[ikadaigaku] medical school
医大[idai] medical university
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一大[ichidai] one large ...
一大事[ichidaiji] serious affair

アジア太平洋地域[ajiataiheiyouchiiki] Asia-Pacific region
印度洋[indoyou] Indian Ocean
遠洋[enyou] ocean
遠洋漁業[enyougyogyou] deep-sea fisheries
仮装巡洋艦[kasoujunyoukan] merchant cruiser

海洋[kaiyou] ocean
海洋科学[kaiyoukagaku] marine science
五大洋[gotaiyou] the Five Oceans (Pacific, Atlantic, Indian, Southern, and Arctic)
三洋[sanyou] Sanyo (company)
巡洋艦[junyoukan] cruiser