A kilojoule (kJ) number on a Seoul clinic menu tells you how much total energy the device will deliver during your appointment. It is a meter, like the shot count on an ultrasound lifting menu. It doesn’t tell you how many sessions you’ll need, how intense each pulse will feel, or what result you’ll get. A 40 kJ tier spread across your back is a very different treatment from 40 kJ concentrated on your jawline.
One more thing before the details: if a line is priced in kJ, don’t assume it’s hair removal. On MIO Clinic’s published menu, hair removal is priced per body area. The kJ-priced lines are Soprano Titanium, ONDA and Body ONDA, and MIO lists Soprano Titanium in its Lifting section, not under hair removal. This guide covers what those kJ tiers measure, how to compare them, and where skin tone fits in.
What is a kilojoule, and why would a clinic sell energy instead of sessions?
One kilojoule is 1,000 joules, and it measures the total energy delivered across every pulse or pass in your treatment. Energy-based devices log that total as they work, so pricing by kJ ties the bill to the amount of device work you actually receive.
Clinics price this way for a few practical reasons:
- Body areas aren’t the same size. “One session” on a small chin and “one session” on a broad abdomen take very different amounts of device work. A kJ figure scales with that difference and a session count doesn’t.
- Some devices are designed to work toward an energy target. In-motion devices glide over a zone again and again until a set amount of energy has been delivered there. The kJ total is the natural unit for these devices.
- It makes tiers comparable on one menu. Small, medium and large packages become 20, 40, 60 and 80 kJ instead of vague labels like “half face” or “full face.”
If you want the wider picture of shots, units and other ways Seoul menus count what you buy, see How to Read a Seoul Clinic Price List: VAT, Shots, Units, and What Actually Changes Your Bill.
What a kJ number doesn’t tell you
A kJ total leaves out three things you probably care about most.
1. Intensity per pulse. What your skin feels, and much of what drives the result, is the energy per square centimetre (fluence, measured in J/cm²) and how it’s delivered. A large kJ total can come from many gentle passes over a big area, and a small total can come from a few concentrated passes. A higher tier doesn’t mean a stronger or more aggressive treatment.
2. Coverage. The same kJ spread over a larger area gives each square centimetre less energy. When comparing tiers, the useful question is how many kJ go to which area.
3. Outcome. No energy figure guarantees a result. Hair reduction, tightening and body contouring all vary with your skin, your hair, your body and how you respond. A kJ tier buys device time and energy. It doesn’t buy a specific result.
The kJ-priced lines on MIO’s published menu
Prices below are as published on MIO Clinic’s menu at the time of writing. All exclude VAT, and choosing a specific doctor adds KRW 100,000 (about $71). Dollar figures are approximate, at roughly ₩1,400 to the dollar, so check the rate on the day you pay. Where the menu shows a higher regular price, the current published price is quoted and the regular price is in brackets.
Soprano Titanium (listed under Lifting)
| Tier | Price (excl. VAT) | Approx. per kJ |
|---|---|---|
| 20kj | KRW 250,000 (~$179), regular 350,000 | ~KRW 12,500 (~$9) |
| 40kj | KRW 440,000 (~$314), regular 650,000 | ~KRW 11,000 (~$8) |
| 60kj | KRW 650,000 (~$464), regular 850,000 | ~KRW 10,800 (~$8) |
| 80kj | KRW 790,000 (~$564), regular 1,000,000 | ~KRW 9,900 (~$7) |
ONDA (face)
| Tier | Price (excl. VAT) | Approx. per kJ |
|---|---|---|
| ONDA 10kj+10kj | KRW 99,000 (~$71), regular 198,000 | ~KRW 4,950 |
| ONDA 30kj+30kj | KRW 299,000 (~$214), regular 518,000 | ~KRW 4,980 |
| ONDA 50kj+50kj | KRW 499,000 (~$356), regular 798,000 | ~KRW 4,990 |
Body ONDA (selected lines)
| Tier | Price (excl. VAT) |
|---|---|
| Body ONDA 50+50 (7mm) | KRW 499,000 (~$356), regular 980,000 |
| Body ONDA 50+50kj (12mm & 7mm) | KRW 749,000 (~$535), regular 980,000 |
| Body ONDA 100+100kj (7mm) | KRW 990,000 (~$707), regular 1,780,000 |
| Body ONDA 100+100kj (12mm & 7mm) | KRW 1,490,000 (~$1,064), regular 1,780,000 |
The per-kJ figures are our own division of the published prices. They aren’t printed on the menu and are only there to help you compare.
What the tiers show when you line them up
Laid out this way, the menu shows a few things that are easy to miss:
- Soprano Titanium gets cheaper per kJ as the tier goes up, from about KRW 12,500 per kJ at 20kj to under KRW 10,000 at 80kj. A bigger tier lowers the unit cost. That only matters if your plan actually calls for that much energy.
- ONDA doesn’t get cheaper per kJ. The three face tiers work out to almost the same cost per kilojoule. You’re paying for more energy, not a bulk discount.
- The handpiece changes the price as much as the kJ figure does. Body ONDA 50+50 costs KRW 499,000 with the 7mm option and KRW 749,000 with 12mm & 7mm, for the same total energy. The body lines pair the two figures in “50+50” or “100+100” with two handpiece depths. For the face ONDA lines, ask what the two figures refer to in your plan.
On a kJ-priced menu, the tier number is one of at least three things that set the price. The others are which handpiece or depth is used and which area it goes to.
Why hair removal at MIO is priced by area
Priced per area, you pay for a zone and a single visit, not an energy total. As published at the time of writing (excluding VAT), MIO’s hair removal lines include:
- Women’s underarm / upper lip / between eyebrows / chin tip (1 area): KRW 5,000 (~$4)
- Men’s same areas (1 area): KRW 10,000 (~$7)
- Men’s full lower face: KRW 40,000 (~$29)
- Women’s full facial: KRW 80,000 (~$57)
- Women’s full arm: KRW 60,000 (~$43). Men’s full arm: KRW 80,000 (~$57)
- Men’s thigh: KRW 150,000 (~$107)
- Men’s full lower face hair removal package (1-year pass): KRW 299,000 (~$214)
Per-area pricing suits hair removal because a course runs as a series. Hair grows in cycles, and light-based treatment mainly affects follicles in the active growth phase at the time. Visits are usually spaced several weeks apart, with face areas often on a shorter rhythm than the body. Per-area pricing makes each repeat visit predictable, and the 1-year pass on MIO’s menu is built for exactly that kind of repetition.
The takeaway is simple: if you came for hair removal, the line you want is priced by area. A kJ line with a familiar device name may be on the menu for a different purpose.
Soprano Titanium: why the name can mislead you
Soprano is a device family best known internationally as a diode hair-removal platform, and many people search for it with hair removal in mind. MIO’s published menu places Soprano Titanium in its Lifting section in kJ tiers, and hair removal appears separately, priced per area.
So don’t book a kJ tier because you recognize the device name. Ask the clinic what that line does in your plan, which area it covers, and how many kJ that area is expected to take. It’s a normal question, and a good clinic will answer it plainly.
How skin tone affects device choice
Skin tone rarely changes the price on a published menu. It does change which device and settings are safe and useful for you. This section is brief because we covered it in depth in Laser Hair Removal on Different Skin Tones: Why the Device Has to Change, and What a Full Course Actually Looks Like.
The core points:
- Light-based hair removal works by targeting pigment in the hair. The more pigment your skin has, the more the skin itself competes for that energy. That raises the risk of burns and pigment changes if settings aren’t adjusted.
- Wavelength matters. Shorter wavelengths (around 755 nm) are strongly absorbed by melanin and are generally used on lighter skin. Longer wavelengths (1064 nm) pass the surface more readily and are generally preferred for deeper skin tones. Diode wavelengths around 810 nm sit in between.
- Settings matter as much as the device. Deeper skin generally calls for more conservative energy, longer pulses and good cooling. That’s one more reason a kJ total says little about how a treatment is tailored to you.
- Microwave-based body devices work differently. ONDA uses microwave energy rather than targeting pigment, so skin tone is generally less of a limiting factor than it is with pigment-targeting lasers. It’s still assessed before treatment.
A recent tan counts as a change in skin tone. If you’ve just come off a beach holiday, tell the clinic, because settings may need to change or treatment may need to wait.
Who isn’t a good fit
Energy-based treatment isn’t right for everyone, whatever the pricing unit. Expect a clinic to slow down or say no if:
- Your hair is very light, grey, white or red. With little pigment to target, light-based hair removal usually does very little, and more kJ won’t change that.
- You have a fresh tan or sunburn in the area.
- You have active infection, open wounds or inflamed skin where treatment is planned.
- You’re pregnant. Many elective energy-based treatments are postponed.
- You have a pacemaker or metal implants near the treatment area. Tell the clinic before anything is booked, especially for body devices.
- You’re on isotretinoin or recently finished it. Clinics often ask you to wait before some energy treatments.
Sensation, downtime and how long results last
MIO’s own guidance lists pain: sting (brief stinging) for its hair removal lines, and pain: none for the Soprano Titanium, ONDA and Body ONDA tiers. Everyone’s tolerance is different, so “none” means numbing isn’t part of the standard plan, not that you’ll feel nothing. For how numbing works across Seoul clinics, see How Much Does It Actually Hurt? Numbing Cream, Injections, and Nerve Blocks in Seoul Skin Clinics.
What to expect afterward:
- Hair removal: redness and small bumps around follicles are common for a few hours to a day. Burns, blistering and pigment changes are uncommon but possible, and more likely if settings don’t suit your skin. Results come as gradual reduction over a series of visits. Some hair can return over time, and many people need occasional maintenance. Permanent, complete removal isn’t something any clinic can honestly promise.
- Microwave or energy-based body and skin treatments: warmth, redness and tenderness in the treated area are typical and usually short-lived. Some people notice temporary firmness or sensitivity. Any change in tightness or contour tends to show gradually over weeks, not on the day, and varies widely between people.
Before and after hair removal, general practice is to shave the area rather than wax or pluck (the follicle needs to be there to be treated) and to protect the skin from sun.
Fitting kJ-priced treatments into a trip
In MIO’s own trip-timing guidance, hair removal, Soprano Titanium, ONDA and the Body ONDA tiers are all marked as fitting any day of a trip. None of them needs to be saved for your first or last day. The real limit for hair removal is the calendar. One visit starts a course, and a short trip can’t give you a full series. If you visit Seoul regularly, an area-priced plan such as the 1-year pass fits that rhythm better than a single large kJ package.
Questions to ask before you pay
Short, specific questions get you the clearest answers:
- What is this kJ line being used for in my plan, and which area does it cover?
- How many kJ is my area expected to take, and why that tier rather than the one below or above?
- What do the two numbers in “10kj+10kj” or “50+50” refer to here?
- Which handpiece or depth is included in the price?
- Is the quoted price before VAT, and does it include choosing a specific doctor?
- For hair removal, how many visits should I expect, and how far apart?
If you get vague answers, ask again or get a second opinion. A clear explanation of what the tier buys is a reasonable thing to expect before you pay.
FAQ
Is a higher kJ tier a stronger treatment? Not necessarily. kJ measures the total energy delivered across the whole appointment, not how intense each pulse is. A higher tier can simply mean more coverage or more passes at the same settings.
Is hair removal at MIO Clinic sold by kilojoules? No. As published at the time of writing, MIO prices hair removal per body area, for example KRW 5,000 (about $4) for one women’s area such as the underarm, excluding VAT. The kJ-priced lines on the menu are Soprano Titanium, ONDA and Body ONDA.
How many kJ will I need? That can’t be decided honestly before an assessment. It depends on the size of the area, what the treatment is meant to do, and how your skin responds. Ask the clinic to explain why a particular tier suits you.
Does my skin tone change the price? On a published menu it usually doesn’t. Skin tone changes which device, wavelength and settings are appropriate. Deeper skin generally calls for longer wavelengths and more conservative settings in light-based hair removal.
Why is the per-kJ price different between Soprano Titanium and ONDA? They’re different devices with different handpieces, uses and running costs. On MIO’s menu, Soprano Titanium gets cheaper per kJ at higher tiers, while the ONDA tiers stay at roughly the same cost per kJ. A kilojoule on one device isn’t worth the same as a kilojoule on another.
Do the published prices include VAT? No. All of MIO’s published prices exclude VAT, and choosing a specific doctor adds KRW 100,000 (about $71). Prices can change, so treat them as published at the time of writing.
Book at MIO Clinic, Gangnam
Seoul Skin Notes is the official journal of MIO Clinic, a skin & aesthetic clinic in Gangnam, Seoul. The MIO team handles consultations and bookings in English over WhatsApp — tell them what you are considering and they will walk you through your options.
MIO Clinic
2-3F, FINE TOWER, 372 Gangnam-daero, Gangnam-gu, Seoul
Gangnam Station, Exit 4 — 3-minute walk
Hours: Mon & Fri 10:00–21:00 · Tue–Thu & Sat 10:00–19:00 · Sun closed
Web：mioclinic.kr/en · Instagram：@mioclinic_global · Email：en-official@mioclinic.kr · Google Maps