断金だんきん Noun English jmdict 1 noun (common) (futsuumeishi) close friendship (i.e. strong enough to cut metal)
断金たんぎん Noun English jmdict 1 noun (common) (futsuumeishi) (in Japan) 2nd note of the ancient chromatic scale (approx. D sharp) See also: 十二律 (じゅうにりつ), 大呂 (たいりょ) Other forms 断吟 【たんぎん】