くま川鉄道湯前線(肥後西村~湯前間)での試運転・訓練運転について(お知らせ) [Notice: Trial and Training Operation on Kumagawa Railway Yuzen Line (between Higo Nishimura and Yuzen)] (PDF). www.kumagawa-rail.com (in Japanese). Japan: Kumagawa Tetsudo. 9 November 2021. Archived from the original(PDF) on 12 November 2021. Retrieved 12 November 2021.
水戸岡さんデザイン最後の車両に? くま川鉄道 [Kumagawa Railroad - Last trains to be designed by Eiji Mitooka?]. Kumanichi.com (in Japanese). Japan: Kumamoto Nichinichi Shimbun. 28 June 2012. Archived from the original on 4 July 2012. Retrieved 29 June 2012.
くま川鉄道湯前線(肥後西村~湯前間)での試運転・訓練運転について(お知らせ) [Notice: Trial and Training Operation on Kumagawa Railway Yuzen Line (between Higo Nishimura and Yuzen)] (PDF). www.kumagawa-rail.com (in Japanese). Japan: Kumagawa Tetsudo. 9 November 2021. Archived from the original(PDF) on 12 November 2021. Retrieved 12 November 2021.
水戸岡さんデザイン最後の車両に? くま川鉄道 [Kumagawa Railroad - Last trains to be designed by Eiji Mitooka?]. Kumanichi.com (in Japanese). Japan: Kumamoto Nichinichi Shimbun. 28 June 2012. Archived from the original on 4 July 2012. Retrieved 29 June 2012.