箱根登山鉄道3000形を導入 [Hakone Tozan Railway to introduce 3000 series]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 6 June 2013. Archived from the original on 4 March 2016. Retrieved 6 December 2016.
箱根登山鉄道,3100形を導入 [Hakone Tozan Railway to introduce 3100 series]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 6 December 2016. Archived from the original on 6 December 2016. Retrieved 6 December 2016.
これが新たな「登山電車」!? 100歳越え電車の後継、2028年度デビュー 座席もいろいろ! 小田急箱根 [Is this the new "mountain climbing train"?! Odakyu Hakone announces successor to the 100-year-old train will debut in 2028 with a variety of seats!]. Traffic News (in Japanese). Japan: Mediavague. 2025-12-23. Retrieved 2025-12-23.
"地下鉄に乗り入れなくなった関東大手私鉄車両 想定しながら乗り入れてない車両まで6選" [6 major private railway vehicles in Kanto that can no longer enter the subway]. Traffic News (in Japanese). 2021-03-20. p. 1. Retrieved 2022-04-12.
箱根登山鉄道3000形を導入 [Hakone Tozan Railway to introduce 3000 series]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 6 June 2013. Archived from the original on 4 March 2016. Retrieved 6 December 2016.
箱根登山鉄道,3100形を導入 [Hakone Tozan Railway to introduce 3100 series]. Japan Railfan Magazine Online (in Japanese). Japan: Koyusha Co., Ltd. 6 December 2016. Archived from the original on 6 December 2016. Retrieved 6 December 2016.