Shiretoko Peninsula

The Shiretoko Peninsula is a mountainous landmass projecting into the Sea of Okhotsk in the eastern Hokkaidō towns of Shari and Rausu. Designated a UNESCO World Natural Heritage site, the national park comprises primeval forests, volcanic peaks, coastal sea cliffs, and marine ecosystems nourished by winter drift ice that support populations of brown bears, deer, seals, and eagles.

Due to the large population of bears on Shiretoko, preparation and caution is required when leaving the main road away from towns. Preparation includes having one or more cans of bear spray and possibly a bell, and caution involves making deliberate noise such as occasional shouts to warn bears of your approach. If you do encounter a bear, the recommended drill is to back off slowly without turning away.

Shiretoko Five Lakes

Shiretoko Goko Lakes consists of five small freshwater bodies formed by ancient volcanic activity from Mount Iō and fed by underground spring waters. The complex sits within a forest of Ezo spruce and Sakhalin fir on the western side of the peninsula in Shari town. An 800-metre elevated wooden boardwalk spans the distance from the field centre to the shoreline of the First Lake. An electrified fence runs along the perimeter of this raised structure to prevent wildlife interactions, making the walkway accessible year-round without a guide even when the ground paths aren’t open. The view at the terminus opens over Lake 1 towards the Shiretoko mountain range.

A separate ground-level nature trail covers a 3-kilometre loop around all five lakes. Between May and July, during peak brown bear activity, access to this lower path requires joining a guided trek led by certified wilderness rangers. During other months, hikers complete a safety briefing regarding wildlife safety protocols before entering. The calm water surfaces reflect the surrounding birch forests and mountain ridges, while the forest floor supports species such as the Japanese wood frog and black woodpecker.

Kamuiwakka Falls

Kamuiwakka Falls flows along the Kamuiwakka River deep within the interior of Shari town. Water from thermal springs on the slopes of Mount Iō flows directly into the river channel, raising the water temperature to approximately thirty degrees Celsius and imparting a high level of acidity. The river itself serves as an open-air thermal stream cascading down series of smooth volcanic bedrock tiers.

Climbing through the shallow riverbed leads to Ichinotaki, the first waterfall level accessible to the public. Due to slippery mineral deposits and acidic conditions, sturdy water shoes or non-slip footwear are required. You’re free to jump into the pools but close your eyes — otherwise the acidic water will cause intense pain. Try putting an old copper ten yen coin into the water and see the acid make it as new again.

The surrounding forest canopy of alder and mountain ash shades the river gorge. Shuttle buses run from the Shiretoko Nature Centre along unpaved forestry roads during peak summer months, as private vehicle access isn’t permitted during this period to protect the fragile terrain.

Mt. Rausu and the Shiretoko Pass

Mt. Rausu stands at 1,661 metres as the highest peak on the Shiretoko Peninsula, straddling the boundary between Shari and Rausu towns. This stratovolcano forms the spine of the peninsula alongside neighbouring peaks such as Mt. Io and Mt. Mitsumine. Climbing trails depart from the Iwaobetsu trailhead on the western side and the Rausu Onsen trailhead on the eastern coast, traversing alpine zones filled with Siberian dwarf pine and rare flora like the Shiretoko violet.

National Route 334 crosses the central mountain ridge via the Shiretoko Pass at an elevation of 738 metres. This mountain highway connects the coastal settlement of Utoro with Rausu port. Snow accumulation closes the pass from early November until late April. From the summit observation area, views extend east across the Nemuro Strait toward Kunashiri Island, while the western side looks down onto dense conifer canopies leading toward the sea.

Oshinkoshin Falls

Oshinkoshin Falls sits directly beside National Route 334 along the western coastline in Shari town. The waterfall drops approximately 80 metres over a steep wall of volcanic rock and measures 30 metres across at its base. Halfway down the cliff face, the main torrent splits into two distinct channels, earning the site the local designation of the “Twin Beauties Waterfall”.

The name derives from the Ainu phrase O-Shunku-Ushi, which translates as “the place where Ezo spruce trees grow in clusters”. A stone staircase climbs from the coastal car park along the base of the cascade, reaching an upper viewing platform situated near the middle spray zone. In late spring, melting snowpack from the interior mountains expands the volume of water, creating heavy spray that reaches the viewing platform. In winter, portions of the cascade freeze into ice pillars against the rock face.

Cape Shiretoko and the coastal cliffs

Cape Shiretoko forms the narrow northern tip of the peninsula, jutting out into the Sea of Okhotsk. The coastline along this northern reach features sheer basalt sea cliffs rising more than 100 metres straight from the ocean. Overland access to the cape isn’t allowed in order to protect the core wilderness zone, leaving boat excursions as the sole method of observation.

Passenger vessels operate out of Utoro Port and Rausu Port, navigating along the base of the sea cliffs. The shore reveals waterfalls cascading directly into the sea, sea caves, and small wooden fishing shacks known as banya, used during seasonal salmon and kelp harvests. Brown bears frequently walk along the stony river mouths searching for spawning chum and pink salmon. Offshore, the waters host white-beaked dolphins, sperm whales, and killer whales in summer. Between January and March, thick packs of drift ice (ryūhyō) float south from the Sea of Okhotsk, covering the coastline and providing resting grounds for Steller’s sea eagles and white-tailed eagles.

Information

Name in Japanese: 知床半島
Pronunciation: shi-re-to-ko han-toh
Address: Shiretoko Peninsula, Onnebetsu, Shari, Shari District, Hokkaidō, 099-4356