Japanese total care brand hada to kokoro has launched the "Kakezan Series" (かけ算シリーズ), a new skincare line centered on the concept of combining two carefully selected active ingredients in each product for a synergistic approach to skin care.
Ingredient Combinations Designed for Specific Skin Goals
The Kakezan Series was developed in response to the growing desire among consumers to choose skincare products based on the specific ingredients they need. By pairing two complementary ingredients in each formulation, the series aims to make it easier to select the right product for a particular skin concern, while also supporting consistent daily use.
Each product is formulated with what the brand calls a "synergy design" — where the combination of ingredients is intended to produce a more direct effect on the target skin impression than either ingredient alone.
The line is also designed with flexible use in mind. For example, the Ceramide x Hyaluronic Acid serum can be used at night to replenish moisture, while the Azelaic Acid x CICA serum works well in the morning to prep skin for smooth makeup application. Users can mix and match based on their skin condition and lifestyle.
Kakezan Synergy Serums — 4 Types, ¥2,640 each (tax included)
Niacinamide x Retinol (HKRN Synergy Serum)
Targets aging skin concerns such as dryness-induced dullness and loss of firmness, guiding skin toward a youthful, bouncy appearance. Scented with an elegant white tea fragrance.
Azelaic Acid x CICA (HKAC Synergy Serum)
Helps protect skin from external stressors like dryness and temperature changes, working to maintain a healthy complexion with refined texture and smoothness. Scented with a calming matcha fragrance.
Glutathione x Vitamin C (HKGV Synergy Serum)
Helps balance the skin's moisture levels and supports a clear, luminous-looking complexion. Scented with a fresh citrus fragrance.
Ceramide x Hyaluronic Acid (HKCH Synergy Serum)
Delivers and locks in abundant moisture to protect skin from dryness, leaving it feeling plump and well-hydrated. Scented with a refreshing green note fragrance.
Each serum can be used on its own or alternated with other products in the line, allowing for a personalized routine that adapts to seasonal changes and daily skin conditions.
Kakezan Gelato Packs — 4 Types, ¥2,640 each (tax included)
Alongside the serums, the Kakezan Series includes a lineup of rinse-off packs that share the same ingredient design. The packs feature a smooth, creamy texture — described as gelato-like — designed to make the application experience as enjoyable as the results.
To use, apply to cleansed, towel-dried skin, leave on for approximately 5 to 10 minutes, then rinse off for an intensive at-home treatment.
Availability
The Kakezan Series went on sale on February 24, 2026, through the &choa! official website and Amazon. Rollout to offline stores across Japan is planned from mid-March 2026 onward.
*1 Compared to the brand's own reference. *2 Skincare appropriate for one's age. *3 Dullness caused by dryness.
