About Core Grid Lab Stream

Core Grid Lab Stream was founded in Choshi, Chiba, by a designer who was tired of choosing between pretty lingerie and clothes she could actually wear all day. In a coastal loft above a fabric supplier, she sketched basic underwear women could forget they were wearing — cotton first, seams second, ego nowhere.

The first drop of comfortable lingerie and an everyday bra sold from a folding table at a weekend market. Customers came back for seamless underwear that disappeared under dresses and cotton lingerie that survived humid summers. That market stall became a mail-order drawer brand shipping womens basics nationwide.

Now Core Grid Lab Stream is a focused line of comfy underwear: seamless underwear, cotton lingerie, and everyday bra styles graded for real Japanese sizing. We still design in Choshi — short ranges, careful fabrics, and packaging as quiet as the pieces themselves.