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Kamata Onsen: Tokyo’s Hidden Black Hot Spring Retreat
Kamata Onsen Set Black bath additive and store’s original towel.
Why do top athletes and celebrities secretly visit this old and worn-down onsen? The answer lies in its legendary black hot spring water—the richest and most premium Black Onsen.
For just 550 yen, you can experience one of Japan’s most authentic and deeply healing hot springs.
A Black Bath Born from the Ancient Sea
Located in Ota City, Kamata Onsen sits on what was once the ocean floor. During the Edo period, this area was famous for high-quality nori (seaweed), grown in the nutrient-rich waters of Tokyo Bay. Over thousands of years, decomposed seaweed and shells transformed into humic minerals, giving Kamata Onsen’s water its distinct black color and incredible therapeutic benefits.
A Family Legacy Since 1937
Run by the same family for four generations, Kamata Onsen has a unique history. The current owner shares a fascinating fact:
“In the past, people here couldn’t even drink well water because it was black! Instead, they bathed in it. Now, we know this black water is full of health benefits, and our onsen remains as popular as ever.”
We have included two special items in this month’s Onsen Box:
A black hot spring bath additive – Developed through research on Kamata Onsen’s unique mineral composition.
A Kamata Onsen exclusive towel – A favorite among celebrities who visit this hidden retreat.
Enjoy the essence of Kamata Onsen from the comfort of your home!
What Makes Kamata Onsen Special?
Ultra-rich black water – No strong odor, but leaves your skin incredibly smooth and moisturized.
Highly therapeutic – Contains sodium bicarbonate chloride (Moor Spring) with natural bicarbonate gas to boost circulation and warmth.
Gentle on the skin – With a pH of 7.9, Kamata’s water is less salty than other Tokyo hot springs, making it suitable for all skin types.
Experience Tokyo’s Deepest Hot Spring Secret
Whether you’re a wellness seeker or a curious traveler, Kamata Onsen offers an authentic, budget-friendly retreat right in the heart of Tokyo.
📍 Kamata Onsen 💰 Entry Fee: 550 yen 💧 Spring Type: Sodium Bicarbonate & Chloride Mineral Spring 🔹 pH Level: 7.9
Ready to soak in Tokyo’s ultimate black hot spring experience?
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