Japan's Top 10 Must-Visit Hot Springs: The Ultimate Onsen Guide
Japan is home to over 3,000 hot springs, or onsen—more than any other country worldwide. Soaking in these geothermal wonders is a time-honored tradition for relaxation and health. Here are the top 10 onsens revered by enthusiasts for their unique settings and benefits.
1. Best Riverside Onsen
Takaragawa Onsen (Gunma, Central Honshū)
Onsen experts often hail Gunma's Takaragawa Onsen as Japan's finest. Meaning 'Treasure River,' its slate-floored pools stretch along hundreds of meters of riverbank. Most are mixed-gender with a women-only option. The alkaline waters help alleviate fatigue, nervous disorders, and digestive issues.
2. Best Inner-City Onsen
Ōedo Onsen Monogatari (Tokyo)
On Tokyo Bay's Odaiba island, this expansive onsen recreates an Edo-period town. Enjoy diverse tubs including outdoor ones, plus restaurants, relaxation areas, shops, massages, and spa treatments. Perfect for a full day of immersive soaking.
3. Best Island Onsen
Jinata Onsen (Shikine-jima, Izu-shotō)
Dramatically set in a rocky seaside cleft on Shikine-jima—a short ferry from Tokyo—these tide-dependent rock pools offer stunning Pacific views. Relax amid crashing waves, with two more excellent onsens nearby.
4. Best Onsen Town
Kinosaki (Kinosaki, Kansai)
This quintessential onsen town on the Sea of Japan coast features seven public baths and numerous ryokan. Experience ryokan baths at leisure, then stroll in yukata and geta to public ones. Atmospheric nights and winter crab cuisine enhance the charm.
5. Best Rotemburo
Sawada-kōen Rotemburo Onsen (Dōgashima, Izu-hantō)
Perched on a cliff overlooking the Pacific, this open-air bath (rotemburo) delivers breathtaking views. Arrive early for solitude or stay for sunset crowds.
6. Best Hidden Onsen
Lamp no Yado (Noto-hantō, Central Honshū)
At the remote tip of Noto Peninsula, access this seaside retreat via a rugged path and stairs. A historic haven with dark-wood rooms, private rotemburo, and Sea of Japan vistas through craggy rocks—a luxurious escape.
7. Best Semitropical Onsen
Urami-ga-taki Onsen (Hachijō-jima, Izu-shotō)
Beside a waterfall in lush jungle, this free rotemburo evokes Bali's finest resorts—but authentically Japanese. Magical late-afternoon sunlight filtering through ferns elevates the experience.
8. Best Onsen/Beach Combination
Shirahama (Shirahama, Wakayama-ken, Kansai)
In this southern Kansai beach town, thrill in alternating ocean swims and natural hot-spring soaks. The free beachside Sakino-yu Onsen is spectacular.
9. Best Onsen/Sand Bath Combination
Takegawara Onsen (Beppu, Kyūshū)
This 1859 Meiji-era gem offers smooth wooden floors and separate hot baths for men and women. Try the signature sand baths: buried in hot sand for 10-15 minutes in a yukata, followed by a soothing onsen rinse.
10. Best Mountain Onsen
Takama-ga-hara Onsen (Northern Japan Alps, Central Honshū)
A full-day hike rewards you with this free riverside rotemburo in an alpine sanctuary. Possibly Japan's highest, with surrounding peaks. Nearby mountain huts offer overnight stays.
