Wavy Hair Before and After Japanese Straightening: What’s Realistic

Wavy hair is the most common type I work with among international clients in Tokyo — and one of the types that tends to produce the most satisfying results from acid straightening. Here’s what to realistically expect.

Why Wavy Hair Responds Well

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📍 Ginza / Yokohama · English · 中文 · 23 years

Wavy hair (1C–2C range) has a lighter wave pattern than curly hair, which means it responds fully to acid straightening with a lower formula strength and lower iron temperature than tight curls require. The result on wavy hair is typically the most natural-looking of any hair type: smooth without looking processed, with natural movement preserved at the roots.

Typical Before and After on Wavy Hair

BEFORE — TYPICAL WAVY HAIR

  • Wave amplifies significantly in Tokyo’s humidity
  • Morning routine: 35–45 minutes
  • Frizz at the roots and mid-lengths
  • Inconsistent shape throughout the day

AFTER — TYPICAL RESULT

  • Smooth through the full day
  • Morning routine: 10–15 minutes
  • Natural movement preserved at roots
  • Consistent shape in all weather

The Most Important Variable: Colour History

For wavy hair, the biggest variable in determining the approach isn’t the wave pattern — it’s colour history. Regular colour (no bleach) is generally straightforward. Bleached sections require different formula pH and iron temperature calibration. Always disclose your full colour history before booking. Bleached hair guide →

📍 KENJI HAIR LOUNGE — GINZA & YOKOHAMA

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English · 中文 · 日本語 · One-on-one · 23 years · Singapore experience

🕙 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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