When you travel through the lush nature of Japan, especially in its mountains, near waterfalls, or along clear streams, you’ll feel a sense of clarity and comfort from the crisp air. Recently, wellness tourism—a style of travel that seeks physical and mental health through the power of nature—has become very popular. Japan’s stunning natural landscapes are the perfect destination for this kind of journey.
The pleasant feeling you experience is thought to be partly due to the high concentration of negative ions in the air. This concentration dramatically increases near waterfalls, making you feel as if you are enveloped in nature’s energy—a truly special wellness experience. Negative ions don’t just purify the air; they are believed to have a profound effect on our bodies and minds, promoting revitalization and refreshment.

The Benefits of Negative Ions for Your Body and Mind
The influence of negative ions on your physical and mental well-being is vast. In our stressful modern society, the importance of spending time in nature is being re-evaluated, and negative ions are a core element of the wellness benefits that nature provides.
- Mental Refreshment and Balancing Your Nervous System
When you’re in an environment full of negative ions, the parasympathetic nervous system, which is responsible for relaxation, becomes more active. Many people feel a sense of calm. The effect is amplified when combined with shinrin-yoku (forest bathing) in Japan’s lush forests, helping to reduce stress and ease your mind. Spending time by a waterfall or in the woods can free you from daily stress and anxiety, helping you regain a peaceful state of mind.
- Air Purification and Benefits for Your Respiratory System
While current medical evidence is limited, some reports suggest that negative ions can neutralize positively charged airborne particles like dust, pollen, and mold spores, causing them to fall to the ground. This process is believed to result in purer air. You’ll especially notice this clean air near waterfalls and clear streams. Taking a deep breath in this crisp air promotes a more comfortable breathing experience and a sense of internal refreshment.
- Promoting Quality Sleep and Fatigue Recovery
The negative ions that float around waterfalls and forests, along with the pure air, are said to bring a deep sense of relaxation. Being in such a tranquil environment can help balance your nervous system and ease tension in your body and mind, potentially leading to deeper sleep. Quality sleep is the foundation for recovering from daily fatigue and regaining vitality. Surrendering yourself to a waterfall or forest can loosen your body and mind, helping to improve your sleep quality and recover from exhaustion.

Wellness Spots to Experience Negative Ions in Japan
Throughout Japan, there are many amazing places where you can be immersed in abundant negative ions.
- Waterfalls: Japan’s three great waterfalls—Kegon Falls in Tochigi Prefecture and Nachi Falls in Wakayama Prefecture, among others—are known for their spectacular flow and thundering sound that soothe visitors’ hearts. Standing in the fine mist rising from the basin allows you to feel the crisp, pure air and a special sense of invigoration.
- Gorges and Clear Streams: Oirase Gorge in Aomori Prefecture is famous for its mystical scenery of moss-covered rocks, clear streams, and dense forests. It is often described as a place where you can “soak in negative ions,” and you can refresh your body and mind while enjoying the beauty of nature in every season.
- Hot Springs: While scientific data on the existence of negative ions in hot springs is limited, some onsen facilities highlight the negative ions found in the steam or mist from waterfalls. Hakone Onsen in Kanagawa Prefecture, for example, is introduced as a healing spot where you can experience negative ions through forest bathing and waterfalls, allowing you to enjoy a relaxation experience that combines nature and hot springs. Beppu Onsen in Oita Prefecture also has some accommodations and day-use facilities that promote the effects of negative ions, offering a refreshing experience along with the therapeutic warmth of the hot springs.

Tips for a Fulfilling Negative Ion Experience
You can enhance the wellness effects of negative ions with a few simple tips.
- Spend Plenty of Time: The effects of negative ions are said to be greater the longer you are exposed to them. Instead of rushing through, sit on a bench or take a leisurely stroll, and feel the air with your entire body.
- Focus on Deep Breathing: In the crisp air, try deep belly breathing. This can make the parasympathetic nervous system more dominant, enhancing the relaxation effect.
- Open Your Senses: Use all five senses to feel nature—the sound of the waterfall, the smell of the wind, the rustling of the trees, the chirping of birds, the sparkle on the water’s surface. This can deepen the connection between your body and mind, leading to a profound sense of refreshment.

Experience Nature’s Healing Power in Japan.
In Japan’s mountains, waterfalls, and clear streams, you can have a special wellness experience filled with negative ions. Step away from your busy daily life and feel the healing that Japan’s rich nature offers. It will give your mind and body a new sense of vitality.