Dictionary/坑道こうどうKoudou坑道 (Koudou) is a Japanese noun meaning “tunnel, (mining) gallery, level, shaft”.Meaningsnountunnel; (mining) gallery; level; shaft; pitKanji in 坑道坑pit道road-wayRelated words道road酷いcruel道具tool報道report (of news)北海道Hokkaido (island, prefectural-level administrative unit)酷くterribly道場dojo軌道orbit鉄道railroad書道calligraphy (esp. Asian calligraphy based on Chinese characters)道路road炭鉱coal mine