Masataka Fujihashi
2026.02.18
Ideal Jaw Form｜Important Elements for Beautiful Contouring
As a plastic surgeon certified by the Japanese Society of Plastic and Reconstructive Surgery, I have been involved in many cases of trauma, reconstruction, and congenital diseases, and have cultivated precise techniques and a deep understanding of anatomy. He entered the field of cosmetic surgery out of a desire to bring the power of cosmetics to his patients, as a change in one's appearance can also make one's mind more positive. Her specialties include general treatment of the eye area, injections, and sagging skin. I provide treatments that focus on beauty with the medical stance of "sincerely addressing the ideals of the patient.
Hello!
Designing natural beauty with trust.
I am Masataka Fujihashi, a board-certified plastic surgeon.
When we think of contouring treatment, we tend to focus on the sharpness of the facial line, the volume of the gills, and the leanness of the sides of the mouth.
However, the morphology of the jaw is the “final piece” that actually determines the beauty of the contour.
No matter how small your face is, it will not look beautifully contoured without a well-shaped chin.
On the other hand, just by having a well-defined jaw, the overall impression of the face can often be refined at once.
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Why the chin determines the completeness of the contour
The human face is evaluated not only in the frontal plane, but also in the "front-back three-dimensionality".
The well-known standard for profile isE line (line connecting the tip of the nose and the tip of the chin)is.
In an ideal situation
Upper lip slightly inside the line
Lower lip almost above the line
It is located at
A short chin makes the mouth appear protruding, while an overly protruding chin gives a squat appearance.
In other words, the chin is the “end point of the contour,” and if this point is out of alignment, the overall balance is lost.
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Golden ratio of length (lower face balance)
Vertical proportions are also important for a beautiful lower face.
Lower nose to upper lip" : "Lower lip to chin tip" ≈ 1:2
Once this ratio is in place.
...Tightens the mouth
... the middle of a person looks short
... Profile is set.
This is the change that occurs.
This is the reason why liposuction and thread lifts alone are not completely solid because they are unadjusted.
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Miter muscles affect balance.
A major cause of jaw morphology is overstrain of the miter muscle.
Too much power,
・Mouth protrudes forward
...E line is broken.
... a little above the tip of the chin swells.
・thin, dried plum wrinklesstick out (e.g. of a bowling alley)
In other words, the muscles, not the skeleton, distort the contours.
In this type, chin hyaluronic acid alone is not enough to prepare the chin.
Botox combinationis extremely important.
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Differences in treatment methods
There are several stages of jaw formation.
In a broad sense, hyaluronic acid, prostheses, and osteotomies are all included in “odontoplasty,” but the term "odontoplasty" generally refers to osteotomies.
Firsthyaluronic acid injection。
It is the easiest to use and excels in fine-tuning the forward/backward and downward directions.
It is the first choice for E-line improvement and is suitable for mildly receding jowls and contour balancing.
nextprosthesis insertion。
Silicone implants allow for stable maintenance of shape and are indicated for moderately receding jaws.
It is suitable for cases that require semi-permanent volume and a certain amount of protrusion.
AndOsteogenesis (osteotomy)。
By cutting, moving, and shaving the bone at the tip of the mandible, the length, anterior-posterior position, and left-right differences of the jaw are fundamentally improved.
Because the approach is made from within the oral cavity, no scarring is left on the skin, and skeletal-level problems such as squatting, retraction, and asymmetry can be corrected.
Osteotomies not only shorten, but can also move the bone fragments forward to bring the jaw forward.
Swelling will subside in 2-4 weeks, but complete stabilization may take several months.
Although there are risks inherent in surgery such as nerve palsy, infection, and hematoma, it is the most reliable method of contour improvement.
While there is a risk of bony resorption of the jawbone over the long term if an excessive amount of hyaluronic acid is injected or an unreasonably sized prosthesis is inserted, the risk is basically quite small with oroplasty.
In many cases, Japanese people have anterior-posterior protrusion and insufficient vertical length of the jaw, and treatment is usually in the direction of "supplementation" rather than "reduction".
Therefore, in many cases, hyaluronic acid injections or prostheses are sufficient to balance the volume, and osteotomies are not necessary in many cases.
On the other hand, if the jaw is too long or there is a left-right difference, shortening or adjustment through osteotomy is necessary.
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Jaw is not the “final tweak”.
The chin is a very important element in achieving a beautiful contour.
If this area is ignored, no amount of other treatment will complete the process.
Contouring treatment is not simply about fat reduction, but must be aligned to a three-dimensional end point.
When the jaw is aligned, the balance of the entire face is naturally harmonized for the first time.
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【Profile】
Masataka Fujihashi, MD, Plastic Surgeon
Leveraging expertise as a board-certified plastic surgeon, I offer comprehensive facial cosmetic procedures including eyelid and nose surgery, facial liposuction, thread lifts, and hyaluronic acid injections. From incisional surgeries and revision procedures requiring delicate design to minimally invasive injections and lifts with minimal downtime, I strive to provide treatments tailored to each patient's ideal outcome.
We are dedicated to achieving natural results and minimizing downtime, pursuing medical care that leaves you feeling confident in your choice through sincere consultations.
Designing natural beauty with trust.
We cherish that sentiment and apply it to our daily practice.
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【Career】
March 2015: Graduated from the School of Medicine, Showa University
April 2015 Showa University Yokohama Northern Hospital Initial Clinical Training
April 2017 Showa University Hospital Department of Plastic Surgery
October 2017 Maebashi Red Cross Hospital Plastic Surgery / Cosmetic Surgery
April 2019 Nishio Municipal Hospital Plastic Surgery Department
April 2020 Showa University Fujigaoka Hospital Plastic Surgery Department
November 2020 Ota Nishinouchi Hospital Plastic Surgery / Cosmetic Surgery
July 2022 Tokyo Rosai Hospital Plastic Surgery / Cosmetic Surgery Department Head
July 2022: R.O.clinic (Part-time), Kusano Taro Clinic (Part-time)
April 2024 Deputy Director, Ginza TA Clinic
November 2025 BIANCA CLINIC
【Professional Affiliations and Qualifications】
Japanese Society of Plastic and Reconstructive Surgery Board-Certified Plastic Surgeon
Member of the Japanese Society of Aesthetic Plastic Surgery (JSAPS)
Member of the Japanese Society of Aesthetic Surgery (JSAS)
