The ingredient list for the Keana Nadeshiko Baking Soda Scrub Face Wash for Men begins with sodium bicarbonate, better known as baking soda. That single fact explains both the appeal and the limits of this product. As a dry powder, baking soda granules make a crisp, effective scrub. As soon as they meet water, they start to dissolve, so the grit softens during massage instead of scratching throughout. And as they dissolve, they turn the lather mildly alkaline, around the pH of a baking soda solution, which is well above the skin's naturally acidic surface. It is a clever, self-limiting scrub, and it is also a product best used sparingly.
Ishizawa Lab publishes the full ingredient list for the men's version, and it is short: sodium bicarbonate, talc, sodium cocoyl glycinate, papain, eucalyptus leaf oil, menthol, camphor, silica, microcrystalline cellulose, ultramarines and rice bran wax. Talc and silica bulk out the powder and absorb oil. Sodium cocoyl glycinate is a mild amino-acid surfactant that creates the foam and cleans gently, which helps offset some of the harshness of the scrub. Microcrystalline cellulose adds softer, non-dissolving scrub particles, and rice bran wax adds a little texture. Ultramarine gives the powder a faint blue tint.
What distinguishes the men's scrub from the original, which contains only baking soda, talc, sodium cocoyl glycinate and silica, are the additions: papain, a papaya enzyme that helps loosen surface keratin; and a cooling trio of menthol, camphor and eucalyptus oil. The result feels much more intense, with a lingering chill that many men enjoy after a workout or on a hot day.
In use, half a teaspoon of powder shaken into wet hands and rubbed with a little water forms a gritty foam. Massaged over the nose, chin and forehead, it polishes away rough, flaky patches, and within seconds the grains melt into a smoother lather. After rinsing, the T-zone feels noticeably smoother, very clean and cool. For oily skin with a rough, congested nose, the effect is genuinely satisfying.
The cautions deserve equal weight. Physical scrubs, even self-dissolving ones, create friction that can irritate. Baking soda's alkalinity, repeated often, can disrupt the skin's acid mantle and barrier enzymes. Menthol, camphor and eucalyptus oil add their own irritation potential, and eucalyptus is a recognised allergen. Put together, this makes the scrub unsuitable for sensitive, rosacea-prone or eczema-prone skin, and a bad idea on freshly shaved skin, where it will sting sharply. Men who shave daily should use it on non-shaving days or several hours before shaving.
For blackheads, which the Keana branding focuses on, expectations should be realistic. Blackheads are plugs of oil and dead skin within the pore. Scrubbing polishes the surface and can loosen the very top, but it does not reach deep inside. A leave-on salicylic acid product, used a few evenings a week, is more effective, and it pairs well with using this scrub occasionally for surface smoothness, as long as the two are not used on the same night.
The practical sweet spot is two or three times a week, on the T-zone only, followed by an alcohol-free toner and a moisturiser. Used this way, most people with oily, resilient skin will enjoy it without problems. Used daily, or all over the face, it is likely to cause tightness, redness or flaking.
The powder format has a couple of practical quirks. Water must stay out of the bottle, or the baking soda cakes and the grains lose their texture, so it is best shaken out with dry hands before stepping into the shower. The amount per use is small, around half a teaspoon, and using more does not improve results; it simply adds grit and alkalinity. The faint blue tint comes from ultramarine pigment, purely cosmetic, and it rinses away completely.
It is also worth comparing the men's version with the brand's original scrub in practical terms. The original is simpler, with just baking soda, talc, an amino-acid surfactant and silica, and it feels milder. The men's version feels more intense because of the enzyme and cooling agents, not because it scrubs harder. Men with slightly more sensitive skin who like the dissolving-scrub concept may actually prefer the original, which avoids the menthol, camphor and eucalyptus.
On value, Japanese Taste sells the 100 gram bottle for about twenty dollars. At two or three uses a week with a small amount each time, it lasts two to three months, making it reasonable value for an occasional treatment.
Ishizawa Lab is a long-established Japanese drugstore brand, and its Keana line is one of the country's best-known pore-care ranges. The brand's habit of publishing full ingredient lists makes it easy to see exactly what the men's version adds. There are no independent clinical studies of the product.
The verdict: a fun, effective occasional scrub for oily T-zones that rewards restraint. Use it as a weekly polish, not a daily wash, and keep it away from shaved or sensitive skin.
