"定期列車での営業運転を終えたキハ281系が返却回送される" [Final KiHa 281 series trainset in regular service transported to depot]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 1 October 2022. Retrieved 14 October 2022.
tetsudo-ch.com
"JR北海道、2022年度までに特急北斗をすべてキハ261系に_H100形気動車も追加投入" [JR Hokkaido all special express Hokuto Kiha 261 series by 2022 - H100 series additional railcar also introduced]. tetsudo-ch.com (in Japanese). EXPRESS Co., Ltd. 22 April 2019. Archived from the original on 14 July 2019. Retrieved 14 July 2019.
web.archive.org
"JR北海道、2022年度までに特急北斗をすべてキハ261系に_H100形気動車も追加投入" [JR Hokkaido all special express Hokuto Kiha 261 series by 2022 - H100 series additional railcar also introduced]. tetsudo-ch.com (in Japanese). EXPRESS Co., Ltd. 22 April 2019. Archived from the original on 14 July 2019. Retrieved 14 July 2019.