If you’ve had Japanese hair straightening, your daily hair dryer matters more than most people expect. Here’s what I use in my salon and what I recommend based on different client needs.
Salon Choice: Bioprogramming Repronizer 4D Plus
This is what I use before every blowdry, on every client. After three years of daily professional use, I find it consistently produces better texture and moisture retention than alternatives I’ve tested. For clients who’ve had straightening and want to maintain results, this is my first recommendation for long-term Japan residents.
SALON CHOICE — DAILY USE
Bioprogramming Repronizer 4D Plus
Best for straightened hair · Japan 100V
Best Value: KINUJO
BEST VALUE
KINUJO Hair Dryer
Gentle heat · quiet · Japan 100V
For Expats Who Travel: Dyson Supersonic
FOR EXPATS WHO TRAVEL
Dyson Supersonic
Dual voltage 100–240V · works globally
Questions about home care after straightening?
In my experience, the right routine makes a meaningful difference to how well results last. Send me a photo for a personalised recommendation.
🕙 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
If you’re unsure which products suit your hair type best, I provide personalised recommendations during consultations at Kenji Hair Lounge in Ginza and Yokohama. Feel free to send a photo for advice before booking.

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