露天掘り炭鉱 ろてんぼりたんこう Also written 露天掘炭鉱 Meanings Noun open-pit coal mine; open-cut coal mine Kanji 露 expose. Read as ロ. 天 heaven. Read as テン. 掘 dig. Read as ほる. 炭 carbon. Read as タン. 鉱 ore. Read as コウ. Jinuma: Japanese Dictionary · Word lists