坑口[koukou] pithead
坑道[koudou] tunnel
坑内[kounai] within a pit or (mine) shaft
坑内事故[kounaijiko] mine accident
入坑[nyuukou] entrance into drift or pit

廃坑[haikou] abandoned mine
金坑[kinkou] gold mine
坑夫[koufu] miner
炭坑[tankou] coal mine
銀坑[ginkou] silver mine

お生憎様[oainikusama] that's too bad (ironical)
御誕生日おめでとうございます[otanjoubiomedetougozaimasu] Happy Birthday
隣の芝生は青い[tonarinoshibafuhaaoi] the grass is always greener on the other side
生きがいい[ikigaii] fresh (e.g. fish)
コンピューター援用生産[konpyuutaaenyouseisan] computer-aided manufacture

委託生[itakusei] scholarship student sent by government office or business
生す[nasu] to build up
異常発生[ijouhassei] plague
医学生[igakusei] medical student
医学生物学[igakuseibutsugaku] medical biology