露天掘り ろてんぼり Also written 露天掘 Meanings Noun surface mining; open-cut mining; open-pit mining See also: 坑内掘り (こうないぼり). Kanji 露 expose. Read as ロ. 天 heaven. Read as テン. 掘 dig. Read as ほる. Words containing 露天掘り 露天掘り炭鉱 (ろてんぼりたんこう) open-pit coal mine Jinuma: Japanese Dictionary · Word lists