Yokohama · Local
Curvy swimwear that celebrates you
Flow Lab Core Vault began in Nishi Ward, Yokohama, after our founder spent years altering plus size swimwear that had simply been scaled up from straight sizes.
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About Flow Lab Core Vault
Flow Lab Core Vault began in Nishi Ward, Yokohama, after our founder spent years altering plus size swimwear that had simply been scaled up from straight sizes. She opened a small pattern room dedicated to curvy bikinis and body positive swimwear drafted on real 1L–5L fits.
The first plus size bikini and one-pieces sold through weekend fittings where women could mix cups and hips freely. Orders for womens beachwear plus size and curvy beach fashion grew by referral — customers finally found plus size swimwear with straps and mesh that worked.
Contact Flow Lab Core VaultFlow Lab Core Vault now ships nationwide from Yokohama — plus size swimwear and curvy bikinis drafted on real fits, womens beachwear plus size with honest straps, body positive swimwear and curvy beach fashion, plus size bikini separates with engineered support. Celebration of shape, not compromise.
What stands out
Why people choose Flow Lab Core Vault
Practical details that matter when you wear plus size swimwear from Yokohama — fit, fabric and how each piece holds up day to day.
Curve-first patterns
Sized 1L–5L
Developed on real plus bodies — not scaled-up.
Real bust support
Underwire & mesh
Engineered cups and power mesh that actually support.
Wide straps
No dig-in
Cushioned straps distribute weight all day.
Smoothing panels
Confidence cut
Ruching and control without squeezing.
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Flow Lab Core Vault collection
Select plus size swimwear from the current Flow Lab Core Vault range. Clear sizing notes on every piece; plain packaging from Yokohama.
Customers
Notes from people who wear Flow Lab Core Vault
“First swimsuit that supports my bust without cutting in.”
— Chihiro M., Yokohama“Ruched one-piece was so flattering all holiday.”
— Sayuri T., Kawasaki“Mixing 4L bottom with 3L top finally worked.”
— Megumi K., YokohamaQuestions
Sizing, care and delivery
Straight answers from the Flow Lab Core Vault desk before you order.
Size range?
We specialise in 1L–5L with bust/waist/hip guides.
Real support?
Underwire, engineered cups and power mesh — not just wider fabric.
Straps dig in?
Wide cushioned straps are designed not to.
Mix sizes?
Yes — most sets available as separates.
Care?
Rinse cold; dry flat in shade.
Shipping?
1–3 days nationwide.
How ordering works
From Flow Lab Core Vault to your door
Four simple steps — choose, confirm fit, we pack in Yokohama, you wear it.
01
Measure three ways
Bust, waist, hip — we publish all three on every suit.
02
Mix your set
Order a larger bottom with a smaller top when you need it.
03
Holiday pack
Plain shipper from Yokohama before your departure week.
04
Keep the liner
Unworn returns need hygiene seals intact.
Lookbook
Inside the Flow Lab Core Vault edit
Close views of fabric, cut and finish from the Flow Lab Core Vault studio.
Flow Lab Core Vault in Yokohama stocks plus size swimwear including plus size swimwear, curvy bikinis, womens beachwear plus size, body positive swimwear. Regular favourites also include curvy beach fashion, plus size bikini. We restock plus size swimwear, curvy bikinis, womens beachwear plus size, body positive swimwear and keep curvy beach fashion, plus size bikini ready for nationwide Japan delivery.
Order
Order form — Flow Lab Core Vault
Send an order or question to the Flow Lab Core Vault desk in Yokohama. We reply within one business day.
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Order from Flow Lab Core Vault
Plain packaging, clear sizing, and delivery across Local from Yokohama.
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