Quick Summary:
Date Tested: 3/17/2025
In this Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ PA++++ sunscreen lotion review, I discover that despite having a long name, the UV protection this product provides is not very good. Thanks for the sample Ruth!
The Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ is a hybrid sunscreen formulation using the active ingredients Ethylhexyl Methoxycinnamate, Polysilicone-15, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Diethylamino Hydroxybenzoyl Hexyl Benzoate, and Titanium Oxide.
The Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ PA++++ sunscreen lotion reduced 42.15% of UVA, 35.19% UVB, and 41.74% of total UVI. Pretty terrible.
Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ PA++++ sunscreen lotion ingredients
Active ingredients: Ethylhexyl Methoxycinnamate, Polysilicone-15, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Diethylamino Hydroxybenzoyl Hexyl Benzoate, Titanium Oxide
Inactive Ingredients: Water, Isononyl Isononanoate, Dimethicone, Ethanol, BG, PEG-12 Dimethicone, Penthylene Glycol, Glycol Dimethacrylate Crosspolymer, Magnesium Ascorbyl Phosphate (Vitamin C Derivative), Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Polysilicone-13, Phenoxyethanol, Carbomer, Triethanolamine, Polystyrene, Polyvinyl Alcohol, Hydroxyethyl Cellulose, EDTA-2Na, Iodopropynyl Butylcarbamate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Ammonium Acrylates Copolymer, Hydrated Silica, Aluminum Hydroxide, Hydrogen Dimethicone, Methylparaben
Manufacturers Website: www.rohto.co.jp
Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ characteristics at a glance:
- Rich moisturizing hyaluronic gel.
- Highly functional all-in-one product that also protects against UV rays.
- This product is an all-in-one gel with UV protection that provides both skin care and UV protection at the same time.
- Contains 2 types of moisturizing ingredients (Na hyaluronate and nanoized hyaluronic acid), the skin-conditioning ingredient vitamin C derivative, which spreads easily and provides moisture.
- 6 functions in 1 product: lotion, serum, milky lotion, mask, cream, and UV protection.
- Viscosity is low.
Prepared slide BEFORE testing
The Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ PA++++ sunscreen lotion distributed unevenly due to the low viscosity.
Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ PA++++ sunscreen lotion UV blocking test results
Ultraviolet light quick reference:
UVA: The Ultraviolet wavelength from 315nm – 400nm. The “Aging UV light” – Causes wrinkles.
UVB: The Ultraviolet wavelength from 280nm – 315nm. The “Bad UV light” – Causes skin cancer.
UVI: The global sun UV index. The more a sunscreen can reduce the level of UVI, the better.
UV test results:
Ultraviolet sensor readings:
| Before Sunscreen | After Sunscreen | % UV Blocked | |
| TEMP | 68.45 | 70.34 | |
| UVA | 45851 | 26524.5 | 42.15% |
| UVB | 2463.5 | 1596.5 | 35.19% |
| UVI | 27.01 | 15.74 | 41.74% |
Want to know more about how I test sunscreen? Head here to read about the details.
Testing notes:
I don’t like saying the product name, it’s too thin, and spreads unevenly. Oh also, bad protection from UV.
Not recommended.
Want to try the Rohto Mentholatum – Hada Labo Koi-Gokujyun UV White Gel SPF 50+ PA++++ sunscreen lotion?
Bad.
Disclosure: the Amazon link shown is the only affiliate link I am sharing on this post. I will earn a commission if you click on the amazon listed product link and place an order (at no cost to you). I do not collect any personally identifying information. Every little bit helps to keep this site up and running, I do appreciate it!