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

岡山県[okayamaken] Okayama prefecture (Chuugoku area)
岡持ち[okamochi] wooden carrying box
岡焼き[okayaki] jealousy
岡場所[okabasho] red-light district
岡目[okame] looking on from the side

静岡県[shizuokaken] Shizuoka prefecture (Chuubu area)
福岡県[fukuokaken] Fukuoka prefecture (Kyushu)
岡辺[okabe] vicinity of a hill
岡惚れ[okabore] unrequited love