Sakazuki Onsen (盃温泉)

Introduction: The Hidden Coastal Gem of the Shakotan Peninsula

Perched on the rugged southwestern edge of the Shakotan Peninsula, overlooking the dramatic “Shakotan Blue” waters of the Sea of Japan, lies Sakazuki Onsen (盃温泉). Named after the Sakazuki River (meaning “Sake Cup”), this tranquil hot spring enclave is a sanctuary for those who seek the wild, unpolished beauty of Hokkaido’s western coast. While most travelers head to the famous Cape Kamui for photography, savvy explorers stop at Sakazuki for its powerful saline springs and its legendary seafood. For the international traveler, Sakazuki Onsen offers a quintessential “Fisherman’s Town” vibe: the smell of sea salt in the air, the sight of squid drying in the sun, and thermal waters that provide a deep, penetrating warmth that matches the intensity of the Sea of Japan. It is a place of solitude, emerald cliffs, and the freshest sea urchin (Uni) you will ever taste.

Key Information Table

The Healing Waters: The Ocean’s Warmth Trapped in Stone

The water at Sakazuki Onsen is a powerful Sodium-Calcium / Sulfate / Chloride Spring. Its mineral composition is remarkably close to seawater, which provides a unique “Salt Veil” effect on the skin. This thin layer of minerals prevents the evaporation of moisture and sweat, keeping your body core warm long after you exit the bath. The water is clear but carries a distinct oceanic aroma. The primary facility, Sakazuki Onsen Kanko Hotel, features a stunning outdoor Rotenburo made of local volcanic stones. From the bath, you can hear the waves crashing against the rocky shore of Sakazuki Harbor. It is considered one of the best “Beauty Springs” in the region, as the calcium ions help to tighten and smooth the skin surface.

Top Recommended Stays & Bases

• Sakazuki Onsen Kanko Hotel (盃温泉観光ホテル): The largest and most reliable facility in the area. It offers traditional Japanese rooms with ocean views. The dinner service is the main attraction, featuring “Aburi-yaki” (grilled seafood) and the famous Shakotan sea urchin during summer.
• Minshuku Sakazuki: A classic fisherman’s guest house where the focus is 100% on the food. Expect no-frills accommodation but a feast of abalone, squid, and seasonal fish caught just meters from your door.
• Iwanai Town Hotels: Located 30 minutes away, Iwanai offers more urban hotel options for those who want to visit Sakazuki as a day trip.
• Sakazuki Campground: One of the most beautiful coastal camping spots in Hokkaido. You can camp right by the water and walk 5 minutes to the onsen for a morning soak.

Must-Visit Scenic Spots: Shakotan Blue and Coves

Benkei-misaki (Cape Benkei): A short drive away, this cape offers a panoramic view of the coastline and is tied to the legends of the famous warrior-monk Benkei.
Sakazuki Harbor (Benten-jima): A picturesque harbor with a small red bridge connecting to a rocky island shrine. It’s a perfect spot for sunset photography.
Kamui-misaki (Cape Kamui): While 40 minutes away, it is the crown jewel of the peninsula. Walk the narrow ridge path to the end for a 300-degree view of the emerald “Shakotan Blue” sea.

Local Gastronomy: The Kingdom of Uni (Sea Urchin)

Sakazuki is a paradise for those who live for seafood.
Shakotan Uni: From June to August, the sea urchin is at its peak. It is served in massive “Uni-don” bowls that are world-famous for their sweetness.
Roasted Squid: A local street-food staple. You will see rows of squid drying in the breeze; they are lightly grilled over charcoal for a salty, chewy snack.
Vegetarian/Vegan Survival: Being a remote fishing village, vegan options are rare. However, the “Shakotan Blue” Soft Serve (made with blue spirulina/mint) is a vegetarian delight. For strict vegans, the local potatoes and corn sold at roadside stalls are the best options. We recommend stocking up on plant-based supplies in Otaru or Sapporo before arriving.

Cultural & Historical Context

The name “Sakazuki” comes from the unique shape of the river mouth, which pioneers thought looked like a shallow Sake cup. Historically, this was a booming area for herring fishing (Nishin), and many of the old “Herring Mansions” (Banya) can still be seen along the coast. The onsen was developed to support the health of the hardworking fishing families. Today, it remains a quiet community where the pace of life is dictated by the fishing seasons and the unpredictable weather of the Sea of Japan.

Practical Travel Tips for International Visitors

• Tattoo Policy: Small tattoos are generally not an issue in this remote area. For large pieces, we recommend covering them with patches. The hotel front desk is used to independent travelers and is very helpful.
• Transportation: A rental car is absolutely mandatory to see the sights of the Shakotan Peninsula. The bus service is very infrequent and does not connect well to the major capes.
• Cash Only: Most local seafood shacks and the campground are cash-only (JPY). The main hotel accepts credit cards for overnight stays.
• Language: English is rarely spoken. Use a translation app and be prepared for “Omotenashi” through gestures and smiles.

2025-2026 Latest Updates

In 2025, Sakazuki Onsen launched a “Sunset Seafood BBQ” program at the harbor, allowing visitors to grill their own catch while watching the sun dip into the Sea of Japan. For the 2026 season, new “Luxury Glamping Tents” are being installed near the campsite, offering easy access to the onsen and a five-star oceanfront camping experience.

Safety & Manners

The Sea of Japan can be rough; never attempt to swim outside designated areas. In the onsen, always wash your body thoroughly before entering the tub. Do not bring towels into the water. Finally, respect the “Fisherman’s Morning”—this is a working town, and people start their day at 4:00 AM, so keep noise levels down in the evening to respect the local rhythm.