TCB Doctors Keisuke Matsumura and Nobuo Yamamoto's Research on Submental Liposuction Published in "Aesthetic Plastic Surgery"; Model Built to Predict "Aspiration Volume".

TCB Tokyo Central Beauty Clinic (Chairman: Hiroo Teranishi, hereinafter "TCB"), which operates 98 clinics nationwide (as of July 2026), announced that its doctors Keisuke Matsumura and Nobuo Yamamoto have analyzed the relationship between preoperative evaluation indicators and actual aspiration volume in submental liposuction. They conducted research to predict aspiration volume using indicators obtainable in outpatient consultations and published their findings in "Preoperative Prediction of Submental Liposuction Volume Using Outpatient-Accessible Measures: A Single-Center Pilot Study Employing the Syringe Technique".

The results of this research were published in the academic journal of aesthetic surgery, "Aesthetic Plastic Surgery," in June 2026.

Paper: "Preoperative Prediction of Submental Liposuction Volume Using Outpatient-Accessible Measures: A Single-Center Pilot Study Employing the Syringe Technique"

<Bibliographic Information>

Paper Title: Preoperative Prediction of Submental Liposuction Volume Using Outpatient-Accessible Measures: A Single-Center Pilot Study Employing the Syringe Technique

Journal: Aesthetic Plastic Surgery

Publication Date: June 2026

Authors: Keisuke Matsumura · Nobuo Yamamoto · Takahiko Tamura · Kohki Okumura · Hiroo Teranishi

DOI: 10.1007/s00266-026-06073-x

URL: https://link.springer.com/article/10.1007/s00266-026-06073-x

<Abstract>

Background

Submental liposuction is a widely performed cosmetic surgery procedure aimed at improving the contour of the jawline and neck. However, methods for quantitatively predicting the amount of fat to be aspirated preoperatively are not well-established, and preoperative explanations and surgical planning have relied on the surgeon's experience. This study aimed to predict the aspiration volume in submental liposuction preoperatively using simple physical measurements obtainable during outpatient consultations.

Methods

A single-center prospective observational study was conducted on 63 cases who underwent submental liposuction using the syringe technique by the same surgeon between January and August 2025. Preoperative evaluations included vertical and horizontal distances of the submental area, subcutaneous fat thickness measured by skinfold calipers, palpated subcutaneous fat hardness, and BMI. The correlation between these indicators and the actual aspiration volume was analyzed, and a multiple regression model was constructed to predict aspiration volume.

Results

The main factors correlated with aspiration volume were subcutaneous fat thickness, vertical distance, BMI, and fat hardness. The final model demonstrated that aspiration volume could be predicted with a certain degree of accuracy using a regression equation based on subcutaneous fat thickness, vertical distance, BMI, and hardness. The prediction formula developed in this study is as follows: Predicted Aspiration Volume (mL) = -7.3587 + 0.7904 × Subcutaneous Fat Thickness (mm) + 0.3084 × Vertical Distance (cm) + 0.8934 × BMI - 4.3066 × Hardness Score (1–3)

Conclusion

This study developed a regression equation to predict preoperative aspiration volume in submental liposuction from simple indicators obtainable during outpatient consultations. This may be helpful for preoperative counseling, surgical planning, training junior surgeons, and standardizing procedures.

<Research Highlights and Future Prospects>

- Research aimed at quantitatively predicting aspiration volume in submental liposuction preoperatively.

- Utilizes indicators obtainable in outpatient settings: subcutaneous fat thickness, vertical distance, BMI, and fat hardness.

- Developed a practical aspiration volume prediction formula from prospective observational data of 63 cases.

- Potential to aid in preoperative explanations, surgical planning, junior surgeon training, and procedure standardization.

<Contributing Doctors>

Keisuke Matsumura TCB Umeda Osaka Ekimae Clinic https://aoki-tsuyoshi.com/doctor/matsumura_keisuke

TCB Umeda Osaka Ekimae Clinic 3F, K’s Square Building, 2-8-15 Sonezaki, Kita-ku, Osaka-shi, Osaka-fu, 530-0057 Phone Reservation: 0120-197-262 https://aoki-tsuyoshi.com/clinic/shinsaibashi/umedaosaka

Nobuo Yamamoto Director, TCB Sendai Ekimae Clinic https://aoki-tsuyoshi.com/doctor/yamamoto_nobuo

TCB Sendai Ekimae Clinic 7F, Sendai TR Building East Wing, 3-6-1 Chuo, Aoba-ku, Sendai-shi, Miyagi-ken, 980-0021 Phone Reservation: 0120-197-227 https://aoki-tsuyoshi.com/clinic/sendai

<Previous Academic Research Activities of TCB>

- June 2026 "Safety of Depth-Adjusted Intravenous Anesthesia in Office-Based Aesthetic Surgery: A One-Month Prospective Study of 135 Consecutive Cases" (Safety and Efficacy of Intravenous Anesthesia in Aesthetic Surgery: Prospective Verification by Protocol) https://prtimes.jp/main/html/rd/p/000000338.000034186.html

- May 2026 "Upward vector observed in all 17 cases after non-absorbable polyester–silicone thread lift: a vectra 3-D pilot study" (3D Quantitative Evaluation of Non-Absorbable Thread Lifts: A Pilot Study Using Vectra 3D) https://prtimes.jp/main/html/rd/p/000000333.000034186.html

- March 2026 "The HIROSHIMA Study: A High-Volume, Institutional, Retrospective, Observational Study of Hidden Non-Incisional Suture Double Eyelid Surgery for Multivariate Analysis of Crease Loss" (Large-scale clinical study elucidating factors for crease loss in buried suture double eyelid surgery) https://prtimes.jp/main/html/rd/p/000000325.000034186.html

- January 2026 "Evaluation of a compression method for transconjunctival fat removal: safety and surgical utility compared to a conventional traction approach" (Evaluation of the compression method in transconjunctival fat removal: safety and surgical utility compared to the conventional traction method) https://prtimes.jp/main/html/rd/p/000000320.000034186.html

- January 2026 "From Contouring to Rejuvenation: A Nationwide Big-Data Analysis of Hyaluronic Acid Injection Trends in Japan" (Analysis of Hyaluronic Acid Injection Trends in Japan: A Big Data Study) https://prtimes.jp/main/html/rd/p/000000318.000034186.html

- January 2026 "Patient Satisfaction After Transconjunctival Orbital Fat Removal: A Multicenter Prospective Study of 920 Cases" (Patient Satisfaction After Transconjunctival Orbital Fat Removal: A Multicenter Prospective Study of 920 Cases) https://prtimes.jp/main/html/rd/p/000000317.000034186.html

- December 2025 "Efficacy of Fibrin Sealant in Submental Liposuction: A Prospective Randomized Trial" "Mid-term Results of Buried Suture Double Eyelid Surgery for Middle-aged and Elderly Individuals - A Single-center Retrospective Study -" "Study on Complications of Thread Lifts ~Clinical Study for Improving Surgical Safety~" "Significance and Countermeasures for Propofol Infusion Syndrome (PRIS) in Aesthetic Surgery Clinics" https://prtimes.jp/main/html/rd/p/000000316.000034186.html

- November 2025 "Time-Series and Demographic Trends in Cosmetic Surgery: Multicenter Analysis of Double-Eyelid Embedding in Japan" (Time-Series and Demographic Trends in Double Eyelid Embedding Surgery in Japan: A Multicenter Analysis) https://prtimes.jp/main/html/rd/p/000000310.000034186.html

- November 2025 "Multicenter Review of More Than 110,000 Facial Thread Lifting Cases From a Cosmetic Surgery Group " (Multicenter Analysis of Over 110,000 Facial Thread Lift Cases from a Cosmetic Surgery Group) https://prtimes.jp/main/html/rd/p/000000313.000034186.html

- November 2025 "Safety Profile of 4,397 Consecutive Intravenous Sedations in Office-Based Esthetic Surgery: A Single-Center Retrospective Audit" (Safety of 4,397 Consecutive Intravenous Sedations in Office-Based Aesthetic Surgery: A Single-Center Retrospective Study) https://prtimes.jp/main/html/rd/p/000000311.000034186.html

- October 2025 "Age-Related Variations in Reoperation Risk from Suture Loosening in Two-Point Buried Suture Double Eyelid Surgery: A Stratified Retrospective Cohort Analysis" (Age-Specific Variations in Reoperation Risk Due to Suture Loosening in Two-Point Buried Suture Double Eyelid Surgery: A Stratified Retrospective Cohort Analysis) https://prtimes.jp/main/html/rd/p/000000309.000034186.html

- October 2025 "Age-Dependent Satisfaction After Transconjunctival Fat Removal for Lower Eyelid Bags: A Multivariate Analysis of Predictive Factors" (Age-Dependent Patient Satisfaction After Transconjunctival Fat Removal for Lower Eyelid Bags and Analysis of Factors for Satisfaction Improvement) https://prtimes.jp/main/html/rd/p/000000305.000034186.html

- October 2025 "Objective evaluation of platelet-rich plasma mesotherapy on facial skin quality: An interim split-face analysis using an advanced imaging system" (Scientific Verification of Skin Quality Improvement Effects of PRP Mesotherapy - A Split-Face Clinical Study Using an Advanced Imaging Analysis System -) https://prtimes.jp/main/html/rd/p/000000299.000034186.html

- October 2025 "Predictors of Dissatisfaction After Polydioxanone Thread Lift: A Multicenter Retrospective Analysis" (Predictors of Dissatisfaction After Polydioxanone (PDO) Thread Lift: A Multicenter Retrospective Analysis) https://prtimes.jp/main/html/rd/p/000000296.000034186.html

- October 2025 "Five-Year Trends in Facial Thread-Lift Practice: A Nationwide Cross-Sectional Analysis of 106,639 Cases by Age Group and Thread Material" (Five-Year Trends in Thread Lift Procedures: A Nationwide Cross-Sectional Analysis of 106,639 Cases by Age Group and Thread Material) https://prtimes.jp/main/html/rd/p/000000295.000034186.html

- August 2025 "Split-Face Comparative Study of Extracellular Matrix and Polynucleotide Injectables Using Objective Skin Analysis" (Split-Face Comparative Study of Extracellular Matrix and Polynucleotide Injectables Using Objective Skin Analysis) https://prtimes.jp/main/html/rd/p/000000278.000034186.html

- July 2025 "Impact of concurrent upper eyelid lipectomy on postoperative complications in buried suture double eyelid blepharoplasty: a retrospective analysis" (Impact of Concurrent Upper Eyelid Lipectomy on Postoperative Complications in Buried Suture Double Eyelid Blepharoplasty: A Retrospective Analysis) https://prtimes.jp/main/html/rd/p/000000283.000034186.html

- July 2025 "Impact of surgical experience on postoperative complications in transconjunctival buried suture blepharoplasty: a single-center retrospective study" (Impact of Surgical Experience on Postoperative Complications in Transconjunctival Buried Suture Blepharoplasty: A Single-Center Retrospective Study) https://prtimes.jp/main/html/rd/p/000000282.000034186.html

And many others.

- TCB Clinic Overview

TCB Tokyo Central Beauty Clinic is a group of cosmetic clinics with 98 locations nationwide. We offer a variety of treatments, including minimally invasive cosmetic procedures, to help our patients achieve "Beauty for Happiness." We pursue your "ideal self" through thorough consultations and simulations in aesthetic medicine.

Clinic Name: TCB Tokyo Central Beauty Clinic Chairman: Hiroo Teranishi Number of Clinics: 98 (as of July 2026) Business Hours: 9:00 AM - 7:00 PM (9:00 AM - 10:00 AM for consultations only; business hours may vary by clinic) Closed Days: Varies by clinic [Web and LINE reservations accepted 24/7, 365 days a year] Official Website: https://aoki-tsuyoshi.com/

Inquiries Regarding This Matter Public Relations Representative: Masayuki Ishikawa (Medical Alliance General Incorporated Association) [email protected]