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SI Nex Core Flow Path

About

The story behind us

We argued about cup seam placement until we got it right.

2018
Roasting since
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Our products
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Pattern-cut in-house by Yuki Tanaka, no…
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Fabric sourced from Nishiwaki and Kiryu…

Our story

2018

Nex Core Flow Path started in a rented room in Shimokitazawa in the autumn of 2018. Yuki Tanaka had spent four years as a pattern-cutter at a mid-size lingerie manufacturer in Osaka, and left after growing tired of watching beautiful fabric get cut into shapes that fit no one particularly well. The first collection was six pieces, made on a single Juki industrial machine, sold through a small Instagram account to friends and friends of friends. The first run sold out in eleven days. Yuki took that as a signal.

The build

The turning point came in spring 2020, when a fabric buyer at Nishiwaki Textile introduced Yuki to a small mill producing a double-knit stretch cotton with a weight and hand-feel unlike anything available from the usual wholesale suppliers. That fabric became the foundation of the Nude Series, which remains the most requested line in the collection. Around the same time, Yuki hired Hana Mori, a former swimwear designer from a Kyoto resort brand, to lead the swimwear side of the business. The two of them spent that summer cutting and re-cutting bikini patterns on a dress form in Yuki's living room, arguing about cup seam placement until they got it right.

Yuki Tanaka
The roaster · Established since 2018
Yuki Tanaka trained as a pattern-cutter at Maison Sato, a mid-size lingerie manufacturer in Osaka, where she spent four years learning to grade swimwear and bralette patterns before realising the industry's standard sizing was built around a single sample size. She left in 2017, spent a year freelancing for a small Tokyo boutique called Hare, and founded Nex Core Flow Path in Shimokitazawa in autumn 2018. Outside the studio, she rides a Miyata touring bicycle along the Tama River on Sunday mornings and keeps a small collection of 1970s Japanese jazz records. She cups every new fabric sample herself before it goes anywhere near a cutting table.
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