A Sake Brewery's Byproduct Becomes a Luxury Skincare Line in Niigata

KOSHINO KIRAMEKI, a cosmetics company founded in April 2025 in Niigata's Konan ward, began selling its new skincare line aelu WA through its official online store on September 24, according to 国際商業オンライン.

The line draws its core ingredient from the lees left over when Ishimoto Sake Brewery produces Koshi no Kanbai Junmai Daiginjo, one of Niigata's most recognized sake labels. Company president Sachiko Ishimoto has framed the product as a way to move sake craft into a different consumer category entirely, translating decades of fermentation know-how into a skincare format aimed at buyers who already associate the Koshi no Kanbai name with quality and scarcity.

新潟日報 reports that the company is targeting affluent consumers specifically, positioning the fermented liquid derived from the lees as carrying beauty benefits that justify a luxury price point rather than competing on volume.

The branding leans on regional identity as much as ingredient science. According to the PR Times release announcing the launch, KOSHINO KIRAMEKI is responding to rising interest in what it calls inner and wellness beauty, and describes its approach as tapping into 'the quiet power of fermentation' cultivated inside the sake brewery itself. The company pairs that fermentation heritage with Niigata's plum culture, folding a second local symbol into the aelu WA identity beyond the sake connection alone.

美ST ONLINE notes that the products first appeared in limited early release in early September before the full online launch on the 24th, giving KOSHINO KIRAMEKI a short runway to gauge demand before scaling distribution.

The bet underlying aelu WA is narrow but specific: that a sake brand's centuries-old production waste, marketed correctly, can support a skincare price tier that ordinary byproduct-based cosmetics rarely reach, provided the story stays tied tightly enough to a single, well-known bottle.