The Hokkaido Maruseppu Recreation Forest Park Railway or Maruseppu Forest Park Ikoi-no-Mori Railway (Japanese: 丸瀬布森林公園いこいの森鉄道, Maruseppu Shinrinkōen Ikoi no Mori Tetsudō) is an approximately 1.24 miles (2.00 km) long narrow gauge heritage railway with a track gauge of 2 ft 6 in (762 mm) near the Japanese City of Engaru near Mombetsu in the Okhotsk Subprefecture on the island Hokkaidō.

The rails with a gauge of 2 ft 6 in (762 mm) were laid in the forest park west-south of Engaru.

It was established in 1907 by Keijirō Amemiya (1846 – 1911) who was the owner of Dai-nippon Kidō Company what had the 8 local light railways in Japan.

Amemiya 21-go is called the first completed version of small industrial steam locomotive made in Japan.

Earlier, the E103 steam locomotive of the E-Class Imperial Japanese Army Railways and Shipping Section what was manufactured by Orenstein & Koppel was exhibited there in a non-operational condition.

After World War II, It was acquired by Seibu Railway and was used on gravel‐digging line of Ahina Station in Kawagoe, Saitama Prefecture.

After Ahina Station was abolished, it had been exhibited in the amusement park of Seibu Railway, and came to Maruseppu in 1990.

Iwasaki Rail Industry was a company made many coaches and wagons forest railways in Japan.