Japanese hair straightening (also known as thermal reconditioning or “shukumoukyousei” in Japanese) has become a popular solution for those who desire sleek, pin-straight hair with minimal daily effort.

However, there’s a persistent question that many people—especially first-timers—often ask:

“Does Japanese hair straightening damage your hair?”

In this blog, we’ll take a deep dive into what Japanese hair straightening is, its pros and cons, and how it affects your hair.

We’ll also introduce damage-minimizing options, proper aftercare, and recommend one of the best salons in London: Baroque Hair and Nails.

What Is Japanese Hair Straightening?

Japanese hair straightening is a permanent hair straightening technique that uses a combination of chemical solutions and heat to break down the hair’s natural bonds and restructure them into a straight pattern. The process typically involves:

1. Applying a chemical solution to break the hair’s natural structure.

2. Rinsing and blow-drying the hair.

3. Flat-ironing the hair at high heat.

4. Applying a neutralizer to lock in the new shape.

This process transforms curly, wavy, or frizzy hair into sleek, straight strands that remain smooth until new hair grows in.

Features of Japanese Hair Straightening

• Permanent results: The straightened portion of your hair stays sleek permanently until it is cut off.

• Time-saving: Cuts down on daily styling time since no additional flat-ironing is needed.

• Frizz control: Excellent for humid climates and people struggling with frizz or flyaways.

• Glossy finish: Leaves hair looking naturally shiny and polished.

Pros and Cons of Japanese Hair Straightening

✔ Pros:

• Long-lasting results

• Sleek, glossy finish

• Saves time on daily hair routines

• Great for unruly or coarse hair

✘ Cons:

• Not suitable for all hair types (e.g., heavily bleached or very damaged hair)

• Chemical processing can cause damage if done improperly

• Regrowth requires touch-ups every 4–6 months

• Limited styling flexibility (harder to achieve curls after treatment)

Does Japanese Hair Straightening Damage Hair?

The truth is—it depends.

Japanese straightening can damage hair if:

• It is done by an inexperienced stylist.

• Low-quality products are used.

• It is applied to already fragile or chemically processed hair.

However, with the right technique, professional care, and quality products, damage can be minimized significantly. In fact, many clients experience hair that feels smoother and looks shinier post-treatment when done properly.

Are There Damage-Minimizing Straightening Services?

Yes. Many modern salons now offer low-damage or bond-protecting straightening services. These include:

• Keratin-infused solutions that nourish the hair while straightening.

• Plex technology (such as Olaplex) added during processing to protect bonds.

• Customized formulas based on hair condition.

At Baroque Hair and Nails in London, stylists are trained in advanced Japanese straightening techniques that preserve hair health while delivering excellent results. Clients often report minimal dryness and lasting smoothness thanks to their use of high-quality Japanese solutions.

How to Care for Your Hair After Japanese Straightening

 

Proper aftercare is essential to maintain your smooth look and prevent damage:

• Avoid washing your hair for 48–72 hours after treatment.

• Use sulfate-free shampoos and conditioners.

• Avoid tight hairstyles and tucking hair behind ears for the first few days.

• Apply heat protection when styling with heat tools.

• Get regular trims to keep ends healthy.

• Deep condition regularly to maintain moisture and shine.

Can You Combine Japanese Straightening with a Smoothing Treatment?

Yes, and it’s a great option for those who want both structure and softness.

Combining Japanese straightening with a smoothing treatment, such as a collagen or protein-based therapy, helps:

• Reduce overall chemical stress.

• Add hydration and elasticity.

• Improve the final finish and feel.

Many high-end salons, including Baroque Hair and Nails, offer this dual approach to achieve straight, yet soft and natural-looking hair with reduced damage.

Why We Recommend Baroque Hair and Nails in London

If you’re looking for expert Japanese hair straightening in London, Baroque Hair and Nails is one of the most trusted destinations for both locals and international clients.

Why choose Baroque?

• Japanese stylists with years of experience

• High-quality Japanese products and straightening formulas

• Thorough consultations to assess your hair condition and goals

• Multilingual staff and English-friendly environment

• Relaxing, modern salon space in the heart of London

Clients from all over Europe choose Baroque not only for the results—but also for the caring, detail-oriented service and warm atmosphere.

Final Thoughts

Japanese hair straightening doesn’t have to damage your hair. With the right salon, skilled professionals, and proper aftercare, you can enjoy the sleek, frizz-free hair you’ve always wanted—without compromising on hair health.

Whether you’re new to the process or looking for a better experience, Baroque Hair and Nails in London offers the best in Japanese haircare technology and technique. Book a consultation and discover the smooth difference.