The Asahi Shimbun (in Japanese). May 16, 2021. Retrieved June 12, 2021. "宮城球場の照明灯 今も現役／緑の支柱がシンボルに" [Miyagi Baseball Stadium's lights are still in use /...

Mitsui Mining Railway (미츠이 광산 전용 철도, Mich'ŭi Kwangsan Chŏn'yong Ch'ŏldo; 三井鉱山専用鉄道, Mitsui Kōzan Sen'yō Tetsudō) as an extension to its Sinanju–Kaech'ŏn mainline;...