Skeletal Contour · Overview
Most waists that will not narrow are limited by fat, and liposuction is the right answer. Some are not. When the angle of the lower ribs, the flare at the front of the rib cage, or a short distance between the last rib and the pelvis leaves no room for a curve, removing more fat changes very little — because fat was never the limit.
This page compares the three skeletal techniques that address that limit: rib remodeling at the side and back, rib remodeling at the front, and iliac crest reduction. Each changes a different part of the waist, carries a different risk, and suits a different torso. The detail of each lives on its own page; this one is for working out which, if any, is relevant to you.
Skeletal waist contouring is surgery that changes the bony frame of the waist rather than the fat over it — by reshaping the lower ribs without removing them, or by reducing the height of the iliac crest — for waists whose limit is the skeleton.
Diagnosis
The question is not how much you want to change, but where your waist stops narrowing. Each of the patterns below points to a different structure. They are a starting point for an examination, not a substitute for one — photographs alone are not enough to decide.
At examination these are measured rather than judged by eye: the costal margin and the iliac crest are marked with you standing, and the distances between the lowest palpable rib, the crest and the trochanter are recorded. If the numbers do not support a skeletal operation, you will be told so.
The Distinction
Older approaches to narrowing the waist removed the eleventh and twelfth ribs. The techniques described here do not. They reshape the lower ribs and leave them in place.
Ultrasound maps each rib and the lining of the lung first. Working through small punctures, a bone-selective ultrasonic instrument scores the outer layer of the rib only, leaving the surrounding muscle undivided. The rib is then angulated, and the inner cortex and periosteum are left intact — so the rib cage keeps its structural continuity.
Because the access is by puncture, the technique does not leave the scar associated with open rib resection. Where liposuction is performed at the same time, its usual small access points apply.
The same applies to what is sometimes called rib repositioning: in these techniques the ribs are repositioned by changing their angle, not taken out.
Comparison
| RIBXCAR | FRONTXRIB | XCREST | |
|---|---|---|---|
| Bone treated | Lower ribs at the side and back | Anterior costal margin — the front lower edge of the rib cage | Iliac crest — the upper border of the pelvis |
| What changes | Narrows the waist in outline | The upper-abdominal line and the front of the waist | Lengthens the waist from below |
| Seen most | From behind and in profile | Face-on and in three-quarter view | At the transition from waist to hip |
| Published data | Multicentre cohort of 3,805 patients: mean waist reduction 11 cm | No dedicated series under this name; the parent technique and the anatomy are published | Series of 200 patients: mean waist 83.11 cm before, 72.06 cm at six months |
| Serious risks | Thoracic — pneumothorax, haemothorax | Thoracic — pneumothorax, haemothorax | No lung behind the bone; pain is the main feature of recovery |
| Fee (incl. tax) | ¥2,200,000 | ¥2,200,000 | ¥2,200,000 |
Figures describe published study populations authored by others. They do not describe results at this practice and are not a prediction of your individual outcome.
The three are complementary rather than competing. RIBXCAR and FRONTXRIB treat different parts of the same rib cage, and a patient can need one, the other, or both. XCREST works at the opposite end of the waist. Combining them in one operation is decided on safety grounds, at consultation.
Rib remodeling is almost always performed together with deep-layer liposuction of the waist: a remodelled rib cage under an untouched layer of deep fat will not show on the surface.
Fees
| Item | Fee (JPY, incl. tax) |
|---|---|
| RIBXCAR — rib remodeling | ¥2,200,000 |
| FRONTXRIB — anterior rib remodeling | ¥2,200,000 |
| RIBXCAR × FRONTXRIB — combined | ¥4,400,000 |
| XCREST — iliac crest reduction | ¥2,200,000 |
| General anaesthesia | ¥165,000 |
| Standard set (anaesthetic, medication, compression garment) | ¥66,000 |
| Blood tests | ¥11,000 |
Liposuction or fat grafting performed alongside is quoted separately — see the full fee schedule. Standard prices, current as of August 2026. Your written quotation is the binding figure. Skeletal procedures are not covered by the one-year guarantee that applies to certain other procedures, and are not covered by health insurance in Japan.
Recovery
The full process — enquiry, online consultation, written plan and travel — is set out on the page for international patients.
Risks
All three are elective surgery on the skeleton, substantially more invasive than liposuction, and their outcome cannot be guaranteed. The risks differ by bone, and it is important not to transfer what is true of one to the others.
Before he performed a single aesthetic case, Dr. Higuchi spent eighteen years in thoracic surgery and lung transplantation. The serious risks of rib remodeling are thoracic ones, and that background is the reason it matters who performs it. The full risk sections are on the RIBXCAR, FRONTXRIB and XCREST pages.
Questions
No. Removing the eleventh and twelfth ribs is the older approach. Rib remodeling keeps every rib: only the outer layer of bone is scored so the rib can be bent to a new angle, while the inner layer and its lining stay whole.
A flare at the front of the lower rib cage is what FRONTXRIB is designed for. It changes the angle of the front rib margin through punctures, leaving the ribs in place and the rib cage continuous. Not every flare is skeletal, so the first step is to confirm on examination that bone, rather than soft tissue, is what is showing.
The surgical fee for RIBXCAR or FRONTXRIB is ¥2,200,000 each including tax, or ¥4,400,000 for both combined. XCREST is ¥2,200,000. General anaesthesia (¥165,000), the standard post-operative set (¥66,000) and blood tests (¥11,000) are additional, and liposuction performed alongside is quoted separately.
By where your waist stops narrowing. If the limit is fat rather than bone, liposuction is the answer. An outline that looks straight from the side or behind points to the lateral and posterior ribs; a flare or ridge at the front of the rib cage points to the anterior margin; a short gap between the lowest rib and the hip bone points to a high iliac crest. This is measured at examination rather than decided from photographs.
Yes, in principle — the ribs set the waist from above and the crest sets it from below, so some torsos need both. Whether that happens in one operation or in stages depends on how long the combined operation would take and how much recovery you can safely carry at once, and is decided at consultation.
At least two weeks after the operation, for all three techniques. You are seen in person before you fly home, and the decision to clear you is made on the day rather than fixed in advance. When to arrive before surgery is part of your written plan.
RIBXCAR, FRONTXRIB and XCREST were developed by Dr. Raúl Manzaneda Cipriani in Lima, Peru, founder of AX — Aesthetic Xpert Scientific Lab. Dr. Higuchi performs them as AX Asia Ambassador and teaches rib remodeling to other surgeons in Japan.
Origin
All three were developed by Dr. Raúl Manzaneda Cipriani in Lima, Peru, founder of AX — Aesthetic Xpert Scientific Lab. Dr. Higuchi performs them as AX Asia Ambassador and teaches within that programme in Japan. The published literature for each technique is listed at the foot of its own page.
Next
The first question is not which operation, but whether your limit is bone at all — and if it is not, none of these operations has much to offer you. The consultation is held online, in English, before you commit to travel.