You live in Tokyo. Your hair gets frizzy every June. This is the complete, practical guide — everything I’ve seen work across thousands of clients over 23 years in this city.
Understanding the Problem
Tokyo’s rainy season (June–July) and summer (July–September) bring sustained atmospheric humidity of 80–90%. Hair absorbs moisture from the air; cuticles lift and separate; wave and curl patterns amplify. The result is frizz that surface products struggle to control when the humidity is this consistent. This isn’t a product problem — it’s a structural one. Solutions need to address it at that level. Full explanation →
Level 1: Product Changes
Switch to silicone-free shampoo
In my experience, this single change produces the most noticeable improvement for clients who haven’t tried it yet. Many imported shampoos contain silicones that may create buildup over weeks, which can make hair more reactive to humidity over time. Give it 4–6 weeks of consistent use to notice the difference.
SBCP Raw Mineral Shampoo
Silicone-free · Japan-formulated · most commonly recommended by my salon
Improve your blowdry routine
- Always blowdry completely — never air dry in Tokyo’s summer
- Apply heat protection when hair is 80% dry, not soaking
- Use concentrator nozzle aimed downward along the hair shaft
- Finish with cool shot to close the cuticle
Level 2: Better Equipment
Japan has some of the best hair dryers available anywhere. A dryer with consistent, controlled heat produces noticeably better results on humidity-affected hair than standard dryers, and the difference accumulates over months of daily use. Best dryers in Japan 2026 →
Level 3: Structural Solution
For clients who’ve worked through levels 1 and 2 and still find Tokyo’s humidity genuinely affecting quality of life — Japanese acid straightening addresses the problem structurally. It changes the hair at the bond level, making it less reactive to atmospheric moisture in a way products can’t replicate. In my experience, clients who have this treatment describe the rainy season as a fundamentally different experience. Is it worth it for you? →
📍 Book an Appointment at Kenji Hair Lounge
If you’re unsure which treatment or products suit your hair type, I provide personalised recommendations during consultations in Ginza and Yokohama. Send a photo first — no commitment required.
Struggling with Tokyo humidity?
Send me a photo and tell me what you’ve already tried. I’ll give you an honest assessment of what’s likely to help most for your specific situation.
🕙 Yokohama: Every Monday + 1st & 3rd Thursday · 8:30–18:30 · Tue–Fri 20:00–23:30 · Tokyo (Ginza): Tue–Sun + 2nd & 4th Thursday · 8:30–18:30
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