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2026.07.18
What Is a Harmonica? An Easy-to-Understand Explanation of Its Expected Effects, Benefits, and Drawbacks
Driven by the belief of “bringing happiness to more people,” I pursued a career in aesthetic medicine after gaining experience in general internal medicine and emergency surgery, along with overseas training. As an internationally oriented doctor holding a UN English Proficiency Test Special Grade A, I treat a diverse range of patients. My goal is to become a true all-rounder, spanning cosmetic surgery, cosmetic medicine, and cosmetic dermatology. With a deep understanding of global beauty standards, I serve as a Key Opinion Leader (KOL) for TargetCool, NEAUVIA®, and CORETOX®. Known for my gentle manner, I provide accessible consultations in both Japanese and English. I pursue aesthetic medicine that transforms not just appearance, but also enhances overall happiness.
For those who say, “I want to add volume to my face, but I’m also concerned about a lack of skin firmness,” Harmonica is a great option.
In this article, we’ll provide an easy-to-understand explanation of how the harmonica works, its expected effects, benefits, and precautions from a doctor’s perspective.
Finally, we’ve also answered some of the questions we’re frequently asked at BIANCA CLINIC, so please feel free to refer to them.
What kind of treatment is "Harmonica"?
Harmonica is an injectable treatment that combines volume restoration with hyaluronic acid and support for collagen production with CaHA.
A formulation combining hyaluronic acid and CaHA
Harmonica (HArmonyCa™) is a hybrid filler that combines hyaluronic acid and calcium hydroxyapatite (CaHA) in a single formulation.
Hyaluronic acid helps restore volume to the treated area and smooths out facial hollows and contours.
On the other hand, CaHA is an ingredient that acts on the tissue after injection and supports collagen production over time.
Immediately after the injection, changes in facial contour are primarily due to hyaluronic acid; thereafter, gradual tissue changes caused by CaHA are expected.
A key feature of the harmonica is that it combines two components that serve different functions.
How CaHA Supports Collagen Production
CaHA is a compound called calcium hydroxyapatite, which is also found in bones and teeth. Harmonica contains this CaHA in the form of fine microparticles.
The injected CaHA microparticles stimulate the surrounding tissue and, through the action of fibroblasts, gradually promote the production of new collagen.
While hyaluronic acid restores volume immediately after injection, CaHA works to support the skin’s underlying tissue over time.
Collagen is an essential component for maintaining the skin’s firmness and elasticity. Therefore, CaHA not only fills in depressions but also helps address issues such as loss of firmness, sagging, and a lack of density in the skin.
However, the changes caused by CaHA do not occur immediately after injection.
Another key feature is that the effects are expected to last for an extended period; depending on the treatment area, results may last for about 1 to 2 years after the injection.
Determining the injection volume while considering the overall balance of the face
In injection treatments, the final results depend not only on the type of agent used, but also on which layer it is injected into and the depth of the injection.
At Bianca Clinic, we determine the injection sites and volumes based on our proprietary injection technique, “BIANCA METHODS,” while taking anatomical structures into consideration.
During the consultation, we'll discuss your preferences and aim for a natural look that avoids excessive volume.
What benefits can you expect from playing the harmonica?
With Harmonica, in addition to correcting facial volume and contours, you can expect to see improvements in skin firmness and density over time.
The main changes you can expect are as follows.
- Volume Correction at the Injection Site
- Adjusting facial contours and three-dimensional appearance
- Approaches to Skin Firmness and Elasticity
- Supports Collagen Production
Since hyaluronic acid treatments restore volume immediately after injection, some people notice improvements in sunken cheeks, hollow temples, and changes in facial contours relatively early on.
However, immediately after the procedure, swelling and puffiness caused by the anesthetic and the injection may occur simultaneously, so it is important to assess the final results as the healing process progresses.
Another feature of Harmonica, a hybrid filler, is that you can feel the changes brought about by CaHA as time goes by.
The main treatment areas offered at Bianca Clinic are the forehead, temples, sunken cheeks, and jawline.
It is used to create roundness and a three-dimensional appearance on the forehead and temples, to address volume loss in the cheeks, and to refine the appearance of the jawline.
Rather than injecting the same amount into every area, we develop a treatment plan after examining the patient’s bone structure, fat distribution, and skin condition.
What are the pros and cons of playing the harmonica?
While the Harmonica procedure offers the advantage of simultaneously addressing two areas, there are precautions to consider, such as swelling, bruising, and the difficulty of making corrections.
The Benefits of the Harmonica
- It allows you to address volume restoration and skin firmness at the same time
- You can expect both immediate results and long-term changes following the injection.
- It makes it easier to develop a treatment plan that takes into account the overall contours and three-dimensional appearance of the face
- The procedure can be performed without making an incision
One of the benefits of Harmonica is that a single formulation allows for the delivery of ingredients that serve different functions.
Hyaluronic acid helps restore lost volume, and CaHA can also be expected to support collagen production.
Disadvantages and Precautions Regarding the Harmonica
- Redness, swelling, puffiness, and bruising may occur.
- The way the effects manifest and how long they last may vary from person to person.
- The CaHA portion cannot be completely dissolved by hyaluronidase alone.
After the procedure, as with most injection treatments, you may experience redness, swelling, edema, bruising, hives, or puffiness.
Symptoms usually subside within a few hours to about two days, but the recovery process varies depending on the individual’s condition and the injection site.
Although hyaluronic acid can be dissolved by hyaluronidase, the CaHA component in Harmonica cannot be dissolved in the same way.
If you have questions about the post-treatment recovery process or whether this treatment is right for you, please check the Harmonica treatment page or consult with a doctor during your consultation.
Frequently Asked Questions
We’ll answer your questions about the ingredients in Harmonica, when its effects become noticeable, and how long they last.
Q. What is CaHA?
A. It refers to calcium hydroxyapatite, a natural mineral component found in bones and teeth. It is believed to be absorbed by the body within about one to one and a half years after injection.
Q. When will I start to see the effects of playing the harmonica?
A. Some people notice a change in volume from hyaluronic acid immediately after the injection. Changes such as improved skin firmness from CaHA take time to appear after the procedure, so we’ll assess the results as they develop.
Q. How long do the effects of the harmonica last?
A. You can expect the effects to last about 1 to 2 years. Since Harmonica gradually breaks down in the body, you can receive another injection if you start to notice the effects wearing off.
Q. Is it okay to get this treatment right before a wedding or a photo shoot?
A. Since swelling, puffiness, and bruising may occur immediately after the procedure, you should carefully consider scheduling it right before a planned event. Because changes resulting from CaHA take time to develop, you should plan your schedule by working backward from your desired date.
At Bianca Clinic, we also offer consultations to help you determine the best time for your treatment.
Q. Can the harmonica be dissolved after the procedure?
A. While hyaluronidase is effective on the hyaluronic acid component, it may not completely dissolve the CaHA component using the same method. It is important to discuss the injection volume and injection sites thoroughly with your doctor.
If you want to improve both volume and skin firmness, consult a doctor.
Harmonica is an injectable treatment that combines hyaluronic acid for volume restoration with CaHA to support collagen production—all in a single formulation.
It is used on the forehead, temples, cheeks, and jawline, but the appropriate areas and injection volumes vary from person to person.
It is important to consider not only the benefits but also the risks associated with filler injections—such as swelling, bruising, and the difficulty of making corrections—before making a decision.
At BIANCA CLINIC, we propose a treatment plan while taking into account the overall balance of your face and your specific wishes. If you’re wondering whether Harmonica is right for you, please feel free to discuss it with us during your consultation.
▶Please see the details of our Harmonica treatment.
▶Please contact us via the online reservation form.
