Saltwater · Winter peak November-January when spawners come to beaches

Japanese Sandfish

Arctoscopus japonicus

The winter beach spawner of the east coast — 도루묵. When temperatures fall, roe-filled females push onto sandy beaches at Gangneung and Sokcho, and pier anglers target them with tiny hooks — a beloved winter tradition. Restraint matters: the roe fish carry the next generation, and a modest take is the custom. In Japan the 2026 audit ruled it a net-only fishery there (grade D); in Korea, winter pier hook fishing is well documented.

Seasons · Peak

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Japanese Sandfish — Photo: Totti, CC BY-SA 4.0 — Wikimedia Commons

Identifying features

Laterally compressed body with beak-like processes on the head — a 'snipefish' silhouette
Minute scales, sandy to greenish colour
Upward-pointing mouth with a projecting lower jaw
Two dorsal fins, the first small and low
Reaches about 10 in (25 cm); livelier colour than a smelt

Habits

Buries in sand by day, emerges at night
Famous for the winter spawning run to east-coast beaches
Roe-filled females are the prize — handle gently and limit the take of spawners
In Japan the audit ruled a net-only fishery; in Korea winter pier hook fishing is well documented
A 'sea smelt' family fish despite the name

Distribution

Regional coverage expanding

Where to find them

Gangneung beach, east coast
Sokcho piers in winter
Donghae sandy bays

Where they live

Sandy surf zones of the east coast in 10-50 ftHarbour piers and sandy beaches at Gangneung and SokchoOpen sand where they come in to spawn in winter

How to catch them

Winter pier fishing Shore

Rig: Light bottom rig with tiny hooks and shrimp cast from piers and sandy beaches in winter

Bait/lure: Small shrimp pieces

Key tip: Fish concentrate at night and dawn — work the lamp-lit areas at the pier tip in winter.

Surf fishing on sand beaches Shore

Rig: Light surf rig with sandworm cast into the trough running parallel to the beach

Bait/lure: Sandworm

Key tip: Spawning fish hold in the first trough — do not cast beyond it.

Best baits & lures

Small shrimp piecesSandwormTiny sabiki lures

Techniques for Japanese Sandfish →

Baseline setup

Rod: Light 7 ft spinning rod
Line: 6-8 lb monofilament
Terminal: Tiny hooks size 8-12 on a bottom rig, light sinkers

Recommended gear for this species

Rod · Best value

7'6" medium-heavy jigging rod

≈ US$110-170

Works 2-6 oz jigs over rock and reef and still has the backbone to lift a halibut off the bottom.

Line · Budget

50 lb braid with 40 lb leader (200 yd)

≈ US$25-40

Thin braid cuts the current so jigs stay vertical; the leader shrugs off rock and teeth.

Terminal · Budget

Leadhead jigs, swimbaits and two-hook bottom rigs

≈ US$25-40

A leadhead with a swimbait tail is the universal bottom-fish catcher, from rockfish to cod to flounder.

Picks come from our rule library — never paid placements. Prices are guides; affiliate links may earn us a commission.

Typical size

Common 6-9 in (15-22 cm); large fish about 10 in (25 cm)

On the table

Highly prized, especially the roe-filled females in winter; a festive grilled or pan-fried fish.

Similar species

Pacific Sand LancePacific sand lance is slimmer, eel-like and a summer fish; Japanese sandfish is laterally compressed with beak processes and comes in winter

Regulations vary by area and can change in-season — always check the official rules for your area before you fish. Regulations guide →

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