The Yagan Railway Co., Ltd. (野岩鉄道株式会社 Yagan Tetsudō Kabushiki-gaisha?) is a Japanese railway company whose major shareholders include the and Fukushima prefectural governments. It operates a single railway line, the Aizu Kinugawa Line (会津鬼怒川線 Aizu Kinugawa-sen?).
The name of the line comes from the kanji characters of the ancient provinces of Shimotsuke (下野?) (now Tochigi Prefecture) and Iwashiro (岩代?) (now Fukushima Prefecture).
The Aizu Kinugawa Line (会津鬼怒川線 Aizu Kinugawa-sen?) is a 30.7 kilometre railway line from Shin-Fujiwara Station in to Aizu-Kōgen Oze-guchi Station Minamiaizu, Fukushima, Fukushima Prefecture. Its nickname is the Hot Spa. Line (ほっとスパ・ライン Hotto Supa Rain?, lit. Relaxing Spa. Line).