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Published: 13 products
When choosing a facial cleanser, have you ever heard things like: "Amino acid-based cleansers are gentler." "Soap-based cleansers have stronger cleansing power." There is some truth to these ideas. In fact, it is possible to estimate a cleanser's cleansing power to a certain extent by looking at the ingredient list. If you could use the ingredient list to choose a cleanser that better matches your current skin condition, selecting the right product would become much easier. In this article, we'll look at how cleansing power is commonly estimated from cosmetic ingredient lists, based on ingredient-labelling rules. We'll also explore both the general rules and some important exceptions, drawing on experience from cleanser formulation and development.
Hiroaki Kaga | Jun 10, 2026
When refilling a foaming facial cleanser, have you ever thought, “It should be fine as long as I use the same bottle”? In reality, it is not just about the formula itself. In cosmetic research and development, quality is assessed not only for the formula, but also for its compatibility with the packaging used. Foaming cleansers in particular can be sensitive because the condition and structure of the pump can affect the quality of the foam. Depending on how the product is refilled, the cleanser may not perform as originally intended. As these are products used on your skin every day, it is worth paying attention to how they are refilled. In this article, we will explain the key points to consider when refilling foaming cleansers, from a cosmetic R&D perspective, in as simple and practical a way as possible.
Hiroaki Kaga | Jun 2, 2026
"My skin has been feeling a bit oilier lately, so I'd like something that leaves my skin feeling fresher." "My skin seems more sensitive than usual at the moment, so I'd prefer a gentler cleanser." Have you ever wanted to adjust your facial cleanser according to the season or your skin's current condition? Cleansing is an important step in any skincare routine. It helps remove excess sebum, dirt, and other impurities while supporting overall skin health. That's why choosing a cleanser with a level of cleansing power that suits your skin's current needs can be an important part of finding the right product. However, when researching cleansing power, you may come across various claims, such as: ・Can you tell how strong a cleanser is just by reading the ingredient list? ・Are amino acid-based cleansers always gentler? ・Are soap-based cleansers always stronger? ・Does tightness after cleansing mean your skin has been thoroughly cleaned? So, how should we actually think about the cleansing power of facial cleansers? In this article, we'll explore the topic from a cosmetic research and development perspective and explain it as clearly as possible.
Hiroaki Kaga | May 29, 2026
Okay, real talk. I have a shelf — actually, two shelves — full of skincare. Glass bottles, droppers, K-beauty essences, French pharmacy creams, that one luxe serum I impulse-bought after a TikTok spiral at 2am. And yet, the product I've been reaching for every single morning and night for the last few months costs ¥268. Less than a coffee. It's a humble little tube of Japanese face wash called 麗白 ハトムギ洗顔フォーム (Reihaku Hatomugi Face Wash Foam), from a brand most people outside Japan have never heard of. And after years of being a self-proclaimed 美容オタク (beauty nerd, not a derm, please don't take medical advice from me), I'm here to tell you: this is the most underrated step in your routine. Let me explain.
Reina Suzuki | May 28, 2026
If you've ever stood in a Welcia, Matsumoto Kiyoshi or Don Quijote staring at a wall of pastel pump bottles, you know the feeling: dozens of Japanese drugstore face washes, most under ¥1,500, all promising poreless, glassy, mochi-hada skin. Some of them genuinely deliver. Some of them are repackaged disappointment in a cute bottle.
Reina Suzuki | May 21, 2026
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