The answer depends almost entirely on your hair type, the strength of your natural curl or wave, and how your hair grows. Here is a realistic breakdown.
Understanding What “Wearing Off” Actually Means
Japanese hair straightening doesn’t wear off on the hair that was treated. The straightened sections remain straight permanently. What happens over time is that new hair grows in with your natural texture — and that new growth is what requires retreatment. How often you need to come back depends on how quickly your hair grows and how bothered you are by the natural texture at the roots.
By Curl Type: Realistic Intervals
| Hair type | Recommended interval |
|---|---|
| Light wave / slight frizz | Every 5–7 months |
| Moderate wave / noticeable curl | Every 4–5 months |
| Strong curl | Every 3–4 months |
| Very strong curl / coily | Every 2–3 months |
How to Extend the Time Between Appointments
- Silicone-free shampoo — the most impactful single change. Silicone buildup accelerates the degradation of your treatment result.
- Pre-blowdry oil — protects the treated hair from daily heat damage, preserving the quality of the result for longer
- 38°C water maximum — hot water disrupts the cuticle and degrades the straightening result faster
- Weekly deep conditioning mask — maintains the hair’s internal condition between appointments
Can You Straighten Too Frequently?
Yes — applying new treatment to already-straightened sections causes cumulative damage. A skilled stylist should apply new product only to the new growth at the roots, leaving previously treated lengths alone. If this isn’t being done at your salon, that’s worth addressing.
🕙 Yokohama: Every Monday + 1st & 3rd Thursday · Tokyo: Tue–Sun + 2nd & 4th Thursday · 9:00–18:30
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