SEYANG · Tongyeong, Korea

Tongyeong oysters,
clean enough to eat raw.

Whole-shell Tongyeong oysters
A raw oyster on the half shell in a gloved hand
Seawater sampling at the depuration tanks
Terraced chain washing system
Shucking and grading in the processing room
Oysters entering the IQF freezing tunnel

01 The sea

It starts in Tongyeong Bay, where oysters grow on longlines in open, clean water.

02 SEYANG

Since 1990, 110 people at SEYANG have turned that harvest into food the world can eat raw.

03 Purify

First they rest in 15 large tanks of filtered, sterilised seawater, until the bay is flushed out.

04 Process

Then they are washed, shucked and graded in rooms built for food eaten raw.

Terraced chain washing · X-ray inspection · Metal detection · Korea’s first oyster line for sushi, 2003

05 Freeze

A mesh-belt tunnel freezes each one on its own at −50°C.

06 Certified

8 countries have registered this plant by number.

  • EUKORP-186
  • USA17731229920
  • ChinaKP-668
  • RussiaKRF-53
  • ThailandKTH-122
  • IndonesiaKID-113
  • EcuadorKEP-25
  • VietnamKVN-175

HACCP E-149 · FSSC 22000 · ESMA Halal · KMF Halal

07 Products

What leaves Tongyeong keeps for 24 months at −18°C.

  • Oyster meat
    Oyster meat
    IQF · 70–85 or 86–105 pcs/kg
  • Half-shell oyster
    Half-shell oyster
    Frozen on the half shell
  • Whole-shell oyster
    Whole-shell oyster
    Frozen whole shell
All products

08 Worldwide

From one bay to kitchens in Japan, Spain and beyond.

NOSUI · KIBUN Trading · MITSUI & CO. · Consignaciones Del Mar

SEYANG MULSAN Co., Ltd.
2133-17, Namhaean-daero, Tongyeong-si,
Gyeongsangnam-do, Korea 53000
Business registration 612-81-05224
Seafood processing and export since 1990
© 2026 SEYANG MULSAN Co., Ltd.

Address

2133-17, Namhaean-daero, Tongyeong-si, Gyeongsangnam-do, Korea, 53000

© 2026 SEYANG. All rights reserved.

Address

2133-17, Namhaean-daero, Tongyeong-si, Gyeongsangnam-do, Korea, 53000

© 2026 SEYANG. All rights reserved.

Address

2133-17, Namhaean-daero, Tongyeong-si, Gyeongsangnam-do, Korea, 53000

© 2026 SEYANG. All rights reserved.

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