If you've been to a dermatology clinic in Tokyo, you've seen the word ブースター (booster) everywhere. Skin boosters have become the fastest-growing category in Japanese aesthetic medicine, and for good reason: they address the thing that fillers and Botox can't — the quality of your skin itself.
This isn't about adding volume or freezing muscles. Skin boosters work at the cellular level to improve hydration, stimulate collagen, and repair damaged tissue. The result isn't "I got work done." The result is "you look really well rested." That distinction is very Japanese, and it's why clinics here have more booster options than almost anywhere else.
For the full landscape of skin treatments in Japan, see our skin treatment Japan guide. For injectable treatments, see fillers Japan and Botox Japan.
A typical skin booster session: micro-injections across the face, 30–45 minutes, minimal downtime.
What Skin Boosters Actually Do
Traditional fillers are architectural — they build structure. Skin boosters are biological — they improve the raw material. A filler lifts your cheek. A booster makes the skin on your cheek look better. Different tools, different jobs.
| Skin Boosters | Fillers | Botox | |
|---|---|---|---|
| What it does | Improves skin quality | Adds volume | Relaxes muscles |
| Changes face shape? | No | Yes | Subtle (jawline) |
| Visible immediately? | Gradual (2–4 weeks) | Immediate | 3–5 days |
| Sessions needed | 2–3 | 1 | 1 |
| Lasts | 6–12 months | 6–18 months | 3–6 months |
| Best for | Dull, tired, dehydrated, scarred skin | Volume loss, lines, contouring | Dynamic wrinkles |
The big three: Rejuran (repair), Profhilo (hydration), Juvelook (collagen). Japanese clinics stock all of them.
The Big Three: Rejuran vs Profhilo vs Juvelook
| Brand | Key Ingredient | Primary Effect | Best For | Price/Session | Sessions |
|---|---|---|---|---|---|
| Rejuran | Polynucleotides (salmon DNA) | Repair + regeneration | Acne scars, damaged skin, pores | ¥30K–80K | 3 (q2–3 weeks) |
| Profhilo | High-concentration HA | Hydration + bio-remodeling | Dehydrated, sagging, aging skin | ¥40K–60K | 2 (q4 weeks) |
| Juvelook | PDLLA + non-crosslinked HA | Collagen stimulation | Fine lines, elasticity loss, aging | ¥30K–50K | 2–3 (q3–4 weeks) |
| Rejuran i | PN (lower viscosity) | Eye area repair | Under-eye lines, dark circles | ¥30K–50K | 3 (q2–3 weeks) |
The simple decision framework: Damaged skin (scars, pores, inflammation) → Rejuran. Dehydrated, tired skin → Profhilo. Aging skin (loss of firmness, fine lines) → Juvelook. Many Japanese clinics recommend combining two — for example, Rejuran for repair + Profhilo for hydration.
Rejuran: Japan's Favorite Skin Booster
Yes, it's made from salmon DNA. No, it doesn't smell like fish. Rejuran contains polynucleotides (PN) extracted from salmon sperm DNA through a process called DNA Optimising Technology. Salmon DNA is highly compatible with human skin, and the PN acts as a powerful repair signal — it tells your fibroblasts to wake up and start producing collagen, elastin, and hyaluronic acid.
Rejuran is the most popular skin booster in Japan and Korea for good reason: it's the only one that genuinely repairs skin at the cellular level. Fillers mask problems. Lasers resurface. Rejuran fixes the underlying damage. As described on BIANCA Clinic's Rejuran page, they choose between regular Rejuran and Rejuran i based on patient concerns and skin condition.
What Rejuran actually improves:
Acne scars (the depressed, pitted kind). Enlarged pores. Sun damage and pigmentation. Under-eye dark circles (Rejuran i). Fine lines and wrinkles. Skin texture and moisture balance. Post-laser recovery (speeds healing by 30–50%).
What Rejuran doesn't do: Add volume, lift sagging skin, or replace fillers. It won't change your face shape. It makes your existing skin better.
Rejuran injection pattern: dozens of micro-droplets across the treatment area. Tiny bumps flatten within 24–48 hours.
Profhilo: The Hydration Bomb
Profhilo is the opposite approach to Rejuran. Where Rejuran repairs damage, Profhilo floods the skin with moisture. It contains one of the highest concentrations of hyaluronic acid available in any injectable — but unlike fillers, it doesn't stay in one spot. Profhilo spreads under the skin like honey, hydrating everything it touches and stimulating collagen and elastin production as it goes.
The technique is famously simple: 5 injection points per side of the face (the "5-point lift" or BAP technique). No complex mapping, no injector-dependent artistry. This makes Profhilo one of the more standardized skin boosters — results are less dependent on individual injector skill compared to Rejuran or fillers.
Best for: Skin that looks "tired" or "crepey." Dehydration from air conditioning (very common in Japan). Early sagging. Anyone over 35 who wants a "glow" without changing anything about their face shape. Profhilo + Botox is one of the most popular anti-aging combos in Japanese clinics.
Juvelook: The Collagen Builder
Juvelook is the newest of the three and rapidly gaining ground in Japanese clinics. It combines PDLLA (poly-D,L-lactic acid) — a powerful collagen stimulator — with non-crosslinked hyaluronic acid. The HA provides immediate hydration while the PDLLA acts as a scaffold that triggers your body to produce new collagen over 12 months.
If Rejuran is the "repair" booster and Profhilo is the "hydration" booster, Juvelook is the "architecture" booster. It rebuilds the collagen framework that your skin has lost with age. Results take longer to appear (full effect at 3–6 months) but last the longest of the three.
Price Comparison: Complete Table
| Treatment | Per Session | Sessions Needed | Total Initial Cost | Annual Maintenance |
|---|---|---|---|---|
| Rejuran (full face) | ¥30K–80K | 3 | ¥90K–240K | 2–3 sessions |
| Rejuran i (eye area) | ¥30K–50K | 3 | ¥90K–150K | 2–3 sessions |
| Profhilo | ¥40K–60K | 2 | ¥80K–120K | 2 sessions |
| Juvelook | ¥30K–50K | 2–3 | ¥60K–150K | 1–2 sessions |
Course pricing (コース料金) saves 15–30%. Japanese clinics love course pricing. Instead of paying per session, you buy 3 or 5 sessions upfront at a discount. For Rejuran at ¥60,000/session, a 3-session course might cost ¥150,000 instead of ¥180,000. Always ask: コース料金はありますか？ (Is there course pricing?)
Budget tip: course pricing saves 15–30%. Buy 3 sessions upfront instead of paying individually.
Japan vs Korea vs US: International Comparison
| Treatment | Japan | South Korea | US/UK |
|---|---|---|---|
| Rejuran (per session) | ¥30K–80K ($200–$550) | ₩100K–200K ($70–$140) | $400–$800 |
| Profhilo (per session) | ¥40K–60K ($275–$410) | ₩200K–400K ($140–$280) | $350–$600 |
| Juvelook (per session) | ¥30K–50K ($200–$340) | ₩150K–300K ($105–$210) | $300–$500 |
Korea is cheapest. Japan is mid-range. US/UK is most expensive. For detailed country comparison, see Korea vs Japan cosmetic guide. Japan's advantage isn't price — it's the dermatology expertise. Japanese skin clinics tend to have more treatment options and more conservative, skin-quality-focused protocols than Korean volume clinics.
Which Booster for Which Concern?
| Your Concern | Best Booster | Why | Combine With |
|---|---|---|---|
| Acne scars | Rejuran | Repairs tissue, stimulates regeneration | Pico laser |
| Large pores | Rejuran | Tightens pore walls from within | Hydrafacial |
| Dehydrated skin | Profhilo | Deepest hydration available | Rejuran |
| Early sagging (30s–40s) | Profhilo | Bio-remodeling tightens tissue | Thread lift |
| Fine lines | Juvelook | Collagen rebuilds skin structure | Botox |
| Under-eye dark circles | Rejuran i | Improves local blood flow + repairs | Under-eye filler |
| Post-laser recovery | Rejuran | Speeds healing 30–50% | Pico laser |
| General anti-aging | Juvelook + Profhilo | Collagen + hydration | Botox + fillers |
The decision tree: repair (Rejuran) → hydrate (Profhilo) → rebuild (Juvelook). Many clinics layer two.
What the Procedure Is Actually Like
Before: Topical numbing cream applied for 20–30 minutes. Some clinics (like Elm Clinic, as noted on their website) mix anesthetic directly into the preparation for near-painless injection.
During: The doctor uses a fine needle or cannula to inject tiny droplets across the treatment area. Rejuran involves dozens of micro-injections in a grid pattern. Profhilo uses 5 precise points per side. The whole thing takes 15–30 minutes depending on the area.
After: Tiny bumps (papules) are visible immediately — this is normal. They flatten within 24–48 hours. Mild redness and swelling for 1–3 days. No makeup for 12 hours. No intense exercise for 24 hours. No sauna, onsen, or hot bath for 48 hours. You can resume normal activities the next day.
Downtime reality check: Skin boosters have less downtime than lasers but more than Botox. The tiny bumps from Rejuran can be visible for 1–2 days — plan accordingly if you have events. Profhilo bumps flatten faster (usually same day). Bruising is possible but rare with experienced injectors using cannula technique.
Smart Combinations
Japanese clinics excel at combination protocols. Skin boosters are rarely done alone — they're part of a broader skin improvement plan. Here are the most common combos:
The "Glass Skin" Protocol: Rejuran (repair) + Profhilo (hydration) + pico laser (texture). 3 treatments over 6 weeks. The Korean-Japanese hybrid approach that delivers the most dramatic skin quality improvement.
The Anti-Aging Trio: Juvelook (collagen) + Botox (wrinkles) + filler (volume). The "liquid facelift plus skin quality" approach. Results that look 5–10 years younger without surgery.
The Scar Protocol: Rejuran (repair) + pico laser (resurfacing) + chemical peel. Alternating sessions over 3–6 months. The most effective non-surgical approach for acne scarring in Japanese dermatology.
Consultation determines which booster (or combination) matches your skin. Bring photos of your concern areas.
Communicating at the Clinic
Most skin booster clinics in Japan operate in Japanese only. Here are the phrases that matter:
| English | Japanese | Reading |
|---|---|---|
| I want skin boosters | スキンブースターをしたいです | sukin buusutaa wo shitai desu |
| Which booster do you recommend? | どのブースターがおすすめですか？ | dono buusutaa ga osusume desu ka? |
| I'm concerned about acne scars | ニキビ跡が気になります | nikibi ato ga ki ni narimasu |
| I want better skin hydration | 肌の潤いを良くしたいです | hada no uruoi wo yoku shitai desu |
| Is there course pricing? | コース料金はありますか？ | koosu ryoukin wa arimasu ka? |
| How many sessions do I need? | 何回必要ですか？ | nankai hitsuyou desu ka? |
| Total price with tax? | 税込みの合計金額は？ | zeikomi no goukei kingaku wa? |
FAQ
What are skin boosters?
Injectable treatments that improve skin quality (hydration, texture, elasticity) without changing face shape. Think of fillers as architecture and boosters as renovation.
How much do they cost in Japan?
Rejuran ¥30K–80K/session, Profhilo ¥40K–60K, Juvelook ¥30K–50K. Most need 2–3 initial sessions. Course pricing saves 15–30%.
Which booster for my concern?
Damaged skin (scars, pores) → Rejuran. Dehydrated/sagging → Profhilo. Aging/collagen loss → Juvelook. Many clinics combine two.
Is Rejuran really salmon DNA?
Yes — polynucleotides extracted from salmon sperm DNA. Highly compatible with human skin, purified and safe. No fish smell, minimal allergy risk.
How many sessions?
Rejuran: 3 sessions (q2–3 weeks). Profhilo: 2 (q4 weeks). Juvelook: 2–3 (q3–4 weeks). Maintenance every 6–12 months.
Can I combine with Botox or fillers?
Yes. Same-day Botox + booster is fine. Filler + booster: some clinics prefer 2 weeks apart. Booster + laser: space 2–4 weeks.
Related Guides
Sources & references: Product information from BIANCA Clinic Tokyo (Rejuran), Elm Clinic (Rejuran), and publicly available clinic pricing data, accessed March 2026. Prices may change; verify directly with your chosen clinic.
Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Individual results vary. Skin booster treatments carry risks including bruising, swelling, and rare allergic reactions. Always consult a qualified medical professional before undergoing any cosmetic procedure. ClinicJapan is an independent guide and is not affiliated with any clinic mentioned.