Mt. Rebun is a relatively low mountain with an altitude of 490 m located on Rebun Island in Rishiri-Rebub-Sarobetsu National Park in the northwestern end of Hokkaido. Rebun Island is a flat island composed of hills and coastal terraces. A variety of alpine plants grow from above sea level due to its high latitude, the island is called “the Island of Flowers.”

Mt. Rebundake is nearly at the center of this longish island. It is counted as one of the 100 beautiful mountains in Hokkaido. Two hours’ walk through the woods of Erman's Birch Sakhalin fir will lead you to the top of the mountain. As the access to the summit is not very difficult, it is visited by a lot of tourists.

In summer, more than 300 species of plants including bunchberry dogwood (Chamaepericlymenum canadense), Isotsutsuji (Ledum palustre var. diversipilosum) and Ezo-suzuran (Epipactis papillosa) come into bloom. However, as the wind is very cold, you must be attentive to your clothes. The 360-degree view from the summit is just magnificent. The emerald green ocean spreads beyond green hills below. Rishiri Fuji on Rishiri Island ―and Teuri Island together with the tip of Sakhalin on a fine day― can bee viewed in the southeastern direction.