Sapporo is famous for snow festivals and ski slopes, but the city hides a secret just 50 minutes south of downtown: Jozankei Onsen (定山渓温泉), a hot spring valley tucked into the mountains along the Toyohira River. And every spring, this gorge transforms into one of Hokkaido's most photogenic spectacles — hundreds of koinobori (carp streamers) strung across the river canyon, fluttering in the mountain wind against a backdrop of fresh green forest.
The Koinobori Display
The Jozankei Onsen Koinobori Display runs from April 10 through May 10, 2026, coinciding with the traditional Children's Day season. Over 400 colorful carp streamers are suspended on wires stretching across the Toyohira River gorge, creating a scene that feels like something out of a Studio Ghibli film.
The koinobori tradition dates back centuries in Japan. Families fly carp-shaped windsocks to celebrate the health and strength of their children — the carp symbolizes perseverance because it swims upstream. At Jozankei, this tradition takes on a dramatic new dimension: instead of hanging from poles in gardens, the streamers soar above a deep river gorge, with the rushing water below and forested mountains on either side.
The best viewing spot is from Futami Suspension Bridge (二見吊橋), a red-painted bridge that spans the gorge and puts you at eye level with the swimming carp. On windy days, the streamers billow and dance as if alive — it's mesmerizing and makes for incredible photos.
Jozankei's Hot Springs
The koinobori display is the seasonal headliner, but Jozankei's real treasure is its onsen. The valley has been a hot spring destination since a Buddhist monk named Miizumi Jozan discovered the waters in 1866. Today, over 20 ryokan (traditional inns) and hotels line the gorge, each with their own baths fed by natural hot springs.
Day-trip bathing options:
- Most ryokan offer higaeri nyuyoku (day-use bathing) for ¥1,000–2,000. This lets you enjoy their indoor and outdoor baths without staying overnight.
- Jozankei View Hotel: One of the largest, with a massive pool-style onsen area and waterslide — great for families.
- Nukumori no Yado Furukawa: A more intimate, traditional experience with beautiful stone outdoor baths overlooking the river.
- Jozankei Tsuruga Resort Spa Mori no Uta: Upscale resort with modern aesthetics and forest views.
Free foot baths: Several free ashiyu (foot baths) are scattered along the main street, perfect for a quick soak while exploring. Look for the ones near the bus terminal and along the river promenade.
Nature Walks
Jozankei sits inside Shikotsu-Toya National Park, and the surrounding forest is spectacular in spring as trees shake off their winter sleep.
Futami Park & River Walk: A paved walking path follows the river through the gorge, connecting several viewpoints. The route passes by the Futami Suspension Bridge (the koinobori viewing spot), small waterfalls, and rock formations carved by centuries of water flow. Allow 30–60 minutes for a leisurely stroll.
Jozankei Dam & Lake: About 3 km upstream, the Jozankei Dam creates a serene reservoir surrounded by forest. In late April, the hillsides show the first hints of fresh green — a stark and beautiful contrast against any remaining patches of snow on the higher peaks.
Kappa Legend: Jozankei is famous for its kappa (river imp) folklore. You'll spot kappa statues everywhere — over 20 of them hidden throughout the town. Hunting for them all makes for a fun scavenger hunt, especially with children.
Seasonal Timing
Spring comes later to Hokkaido than to the rest of Japan. While Tokyo's cherry blossoms peak in late March, Jozankei's natural spring arrives in late April to early May:
- Early–mid April: The koinobori are up but the landscape is still wintry-brown. Dramatic contrast between colorful streamers and bare trees.
- Late April: Fresh green leaves emerge. The gorge starts its spring transformation.
- Early May (Golden Week): Peak beauty — lush green valley, koinobori in full flutter, warm enough for comfortable outdoor walks. This is also the busiest period.
- Mid May: Koinobori come down around May 10. Spring is fully established.
For the best balance of scenery and crowds, late April is ideal — you get the koinobori, emerging spring colors, and fewer visitors than Golden Week.
Getting There from Sapporo
Jozankei is surprisingly accessible:
- Jotetsu Bus: Direct buses run from Sapporo Station (Bus Terminal) and Makomanai Subway Station to Jozankei Onsen. The ride takes about 60–75 minutes from Sapporo Station, or 50 minutes from Makomanai. Buses depart roughly every 30 minutes.
- Kappa Liner: A convenient direct bus service that runs during peak season. Check the Jotetsu Bus website for schedules.
- By car: Take Route 230 south from Sapporo. The drive is about 50 minutes and passes through increasingly mountainous scenery. Parking is available at several lots near the onsen area.
A Perfect Day-Trip Itinerary
Morning:
- 9:00 — Depart Sapporo by bus
- 10:00 — Arrive Jozankei. Walk to Futami Suspension Bridge for koinobori viewing
- 10:30 — River walk through Futami Park, spot kappa statues
Midday:
- 12:00 — Lunch at a local restaurant. Try Jozankei's specialty: onsen manju (steamed buns) and soba noodles. Several restaurants along the main street serve Hokkaido specialties like soup curry and Genghis Khan (lamb barbecue).
Afternoon:
- 13:30 — Day-use onsen at a ryokan of your choice (budget 2 hours for a relaxing soak)
- 15:30 — Free foot bath along the promenade, browse souvenir shops
- 16:00 — Catch the bus back to Sapporo
Evening: Back in Sapporo by 17:00–17:30, refreshed and ready for dinner in Susukino or at the Sapporo Beer Garden.
Combine With Other Sapporo Attractions
If you're spending several days in Sapporo, pair Jozankei with these nearby experiences:
- Moerenuma Park: Isamu Noguchi-designed park with striking sculptures and glass pyramids, 30 minutes north of downtown.
- Sapporo Beer Museum: Learn the history of Japan's most famous beer brand, with tastings.
- Odori Park: The city's central green belt, beautiful as spring flowers begin to bloom.
- Shiroi Koibito Park: Ishiya chocolate factory with tastings and a European-style garden.
Practical Tips
- Bring a towel: Most day-use onsen charge extra for towel rental (¥200–300), or you can bring your own.
- Tattoo-friendly options: Some Jozankei onsen are tattoo-friendly or offer private baths. Ask at reception or check beforehand.
- Cash recommended: Smaller shops and some onsen still prefer cash. There's a convenience store near the bus terminal.
- Weather: April in Jozankei averages 5–15°C — significantly cooler than downtown Sapporo. Bring warm layers.
- Photography: The best koinobori photos come from Futami Suspension Bridge in the morning when sunlight hits the gorge. Windy days make the streamers more dynamic.
Why Jozankei Deserves Your Time
Most visitors to Hokkaido head straight for Niseko, Furano, or Otaru. Jozankei remains beautifully under-the-radar — a place where you can soak in century-old hot springs, walk through a river gorge draped in hundreds of flying fish, and experience a side of Sapporo that most tourists never discover. The koinobori display adds a layer of seasonal magic that makes a spring visit truly special. It's a reminder that in Japan, even the simplest traditions — paper fish in the wind — can be transformed into something extraordinary when the setting is right.
Image: Jozankei Hot Springs, Sapporo, Hokkaido, CC BY 2.0, MIKI Yoshihito, via Wikimedia Commons
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