**Mount Rishiri (1,721 m)** is the northernmost of Japan's 100 Famous Mountains and is affectionately known as **"Rishiri Fuji"** for its beautiful cone-shaped silhouette. Rising almost directly from sea level, it offers one of Japan's most rewarding island climbs. From the summit, you'll enjoy breathtaking 360-degree views of the Sea of Japan, Rebun Island, and, on exceptionally clear days, even Sakhalin. The trail begins in a pristine forest of Sakhalin fir and Erman's birch before climbing through alpine meadows and dramatic volcanic terrain. Above the tree line, spectacular ridge walking and sweeping panoramic views await. In summer, the mountain is home to rare alpine flowers, including the iconic Rishiri poppy, making the climb especially memorable for nature lovers. The Oshidomari Trail is approximately **12 km round trip**, with an **elevation gain of 1,500 m**, and takes **10–12 hours** to complete. It is a challenging climb that requires good fitness and previous hiking experience, but the sense of achievement and unforgettable summit views make it one of Hokkaido's finest mountain adventures. At **Rishiri Rebun Guide Net**, our experienced local guides prioritize your safety while sharing their knowledge of the island's unique alpine plants, birdlife, volcanic history, and local culture. By adjusting the pace to match both the weather and your fitness level, we provide a safer and more rewarding climbing experience than hiking independently. Whether you're aiming to complete Japan's 100 Famous Mountains or simply looking for an unforgettable mountain adventure in Hokkaido, climbing Mount Rishiri is an experience you'll never forget.