洞道 とうどう noun (common) (futsuumeishi) 洞道とうどう Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) service tunnel (cables, gas, etc.) 漢字 kanji used 洞 den, cave 9画 道 road-way, street 12画
洞道とうどう Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) service tunnel (cables, gas, etc.)
Shirabe