Hairtail (Tachiuo) Fishing with JDM Tenya Rigs: Complete Guide

Every few winters, Sydney's deep, sheltered waterways light up with one of the strangest fisheries in the country: the hairtail run. Long, chrome-silver and armed with genuinely frightening fangs, hairtail — known in Japan as tachiuo (太刀魚, the "sword fish") — are a night-time obsession for the small band of dedicated anglers who target them. In Japan, tachiuo fishing is a massive sport with an entire tackle category built around it, and the deadliest technique of all is the tenya: a weighted, glow-painted jig head that carries a whole baitfish wired to its shank. Almost nobody in Australia fishes it. This complete fishing guide covers hairtail fishing in Sydney with genuine JDM tenya tackle — when and where the winter run happens, the rods, leaders and lights, how to rig and work a tenya, and how to safely land a fish that is essentially a metre of angry ribbon with teeth.

A Species Like Nothing Else: Hairtail Characteristics, Size and Distribution

The largehead hairtail (Trichiurus lepturus) — known elsewhere as cutlassfish or ribbonfish — looks like nothing else you will catch in Australian waters. The body is thin and ribbon-like, tapering to a thin whip-like tail with no distinct caudal fin, and the skin carries no scales at all — just that characteristic liquid-chrome silver. It is not a confusing species to identify — nothing else in the estuary shares the shape. Up front is a jutting lower jaw full of interlocking, needle-sharp slashing teeth. Most fish run around a metre in length; good ones stretch well past that, though the measure of size Japanese anglers actually brag about is body depth, not length. In Japan, tachiuo are graded in finger-widths (yubi): a "three-finger" fish is standard, a "five-finger" fish is a trophy.

For most of the year hairtail live as a deepwater, offshore species, with a distribution running right along Australia's east coast and down into southern NSW waters — but in the cooler months they push into coastal bays and estuaries, and that is when Sydney's fishery happens. They are true creatures of the dark: by day they hold deep near the bottom, then rise through the water column at night to hunt small baitfish, often hanging almost vertically, tail-down, before slashing upward at prey. By the warmer summer months they are gone again. That vertical, ambush-style feeding is exactly what the tenya was designed to exploit.

The Sydney Winter Hairtail Run: Hawkesbury River, Deep Bays and Sydney Harbour Fishing

Sydney sits on one of the few reliable-ish hairtail fisheries in the country — with heavy emphasis on the "ish". Hairtail prefer deep, sheltered water, and through the winter months — roughly May to August — they move into it inside our estuaries. The historically famous grounds are the deep holes of Cowan Creek and the wider Hawkesbury River system — Jerusalem Bay and Coal and Candle Creek have been written about for generations — and fish also turn up sporadically in Sydney Harbour fishing circles, usually from the deeper reaches after dark. Odd fish are reported from other deep systems — Pittwater, Port Hacking, even Botany Bay — but Cowan remains the heartland. These are not secret spots; they are the best-documented hairtail water in NSW. The same deep winter holes produce jewfish for recreational anglers, so a quiet night is rarely wasted.

Two honest caveats before you plan a season around them:

• The run is erratic. Some winters the deep bays fire for weeks; other years barely a fish shows. Nobody can tell you why with certainty. Treat every session as a lottery ticket with good odds in a cold-water year, and favour calm, stable weather over blustery change nights.
• It is a night fishery. The classic approach is an anchored boat over 20–50 m of water after dark, a steady trail of berley, lights over the side, and baits or tenya presented at staggered depths. The traditional Sydney rig is a ganged pilchard — or sometimes small live baits — drifted under a chemical glow stick with just enough sinker to hold depth; the tenya below replaces all of that with one compact unit. Winter nights on the water get properly cold — rug up, tell someone your plans, and wear your lifejacket.

What almost no Australian angler has tried on these fish is the technique the Japanese consider the pinnacle of the sport. That gap is your opportunity.

What Is a Tachiuo Tenya?

A tenya is a compact, heavily weighted jig head with one or two fixed, upward-facing hooks and a keel-shaped body, usually finished in glow or UV paint. A whole baitfish — in Japan typically a sardine, here a pilchard — is lashed along the shank with fine wire, so the bait and the hooks move as one solid unit. Tenya fishing for tachiuo is a staple of Osaka Bay and Tokyo Bay boat fishing, with entire rod ranges, tournaments and TV shows devoted to it.

Why it beats the traditional Aussie ganged-pilchard rig in three ways:

1. It survives the nip. Hairtail rarely inhale a bait first go — they slash and nip at the tail. A ganged pilchard gets destroyed; a wired bait on a tenya stays put through repeated hits, keeping you in the game.
2. It fishes actively. A tenya is dense enough to cast, count down and retrieve, or work vertically under the boat. You hunt the depth the fish are holding at instead of waiting for them to find a suspended bait.
3. The hook sits where the bite is. The fixed hooks ride at the bait's head, exactly where a following hairtail finally commits, which converts far more of those tap-tap follows into solid hook-ups.

If JDM terminal tackle like this is new territory, start with our pillar guide — what is JDM fishing tackle? — then browse the full tenya collection to see the style of heads we bring in from Japan, all genuine stock with Australian warranty.

Tackle for Hairtail Tenya Fishing

You do not need a dedicated Japanese tenya rod to fish this technique in Sydney, although they are a joy to use. Here is a sensible AU-friendly setup.

Rod and reel

A light jigging rod, a heavy squid (egi) rod or a crisp 1.8–2.1 m spin rod with a sensitive tip and enough backbone to set hooks into a bony jaw is ideal. Pair it with a 3000–4000 size spinning reel or a small overhead. The rod does two jobs: telegraphing tiny tail-nips through the blank, and driving fine hooks home with a short, sharp strike.

Line and leader

Run PE 0.8–1.5 braid for feel, then get serious about the business end — hairtail teeth shear light mono like scissors through ribbon. You have two schools of thought:

• Heavy nylon. Japanese tachiuo anglers commonly fish a short trace of very heavy nylon — treat 50 lb as the working minimum — and accept the odd bite-off in exchange for more bites. A one-metre trace of Gamakatsu No.18 (55 lb) nylon leader is exactly the kind of purpose-cut JDM trace built for this.
• Wire. For peace of mind — especially when big fish are about or the bite is hot — a short single-strand or fine multi-strand trace from our wire collection ends bite-offs entirely. Keep it short (15–30 cm) so the rig still swims naturally.

Rigging and Baiting the Tenya

Rigging is half the craft — practise at home before you are doing it with numb fingers at 9 pm.

1. Choose a straight, firm bait. A whole pilchard is the Sydney standard; a strip of squid or garfish also works. Fresh and firm beats big and soft — a crooked bait spins, and a spinning tenya gets ignored.
2. Seat the bait along the shank. Lay the pilchard belly-down along the tenya's hook shank so the head of the bait sits snug against the lead head.
3. Wire it on. Using the tenya's fine keeper wire, take firm wraps behind the bait's head, then spiral down the body and finish with locking twists. The bait should feel like part of the jig — no wobble, no loose tail section.
4. Charge the glow. Hit the glow head with a torch or UV light before every drop. In deep, dark winter water that soft green halo is often what draws the first slash.

Working the Tenya: Technique

The slow wind

The bread-and-butter tachiuo retrieve is disarmingly simple: cast or drop to depth, then wind slowly and dead-steadily — in Japan this is tadamaki, "just winding". The tenya tracks on an even keel, bait glowing, and following hairtail track it like a missile. Resist the urge to add flicks and twitches; the steadiness is the trigger.

Count the drop, find the layer

Hairtail stack at a specific depth band that shifts through the night, usually rising as the hours pass. Count your tenya down — say, twenty seconds first drop, fifteen the next — and note the count when hits come. Once you find the layer, you can park every subsequent retrieve in the strike zone instead of fishing blind water.

Converting the tap-tap bite

This is where tenya fishing becomes an art. A following hairtail nips the bait's tail — you feel tick… tick through the braid. Do not strike. Keep winding at exactly the same pace, or fractionally faster, as if the bait is fleeing. The fish follows, commits, and the ticks turn into solid weight as the rod loads. Now strike, short and hard — a hairtail's jaw is bony, and a lazy lift will pull fine hooks straight out. If a fish drops the bait, pause a beat, then resume the same slow wind; they very often come back.

Lights, Glow and the Attraction Game

Hairtail are famously light-responsive, and the Sydney old-timers knew it long before LEDs existed — lanterns over the gunwale were part of the classic Cowan Creek scene. Modern JDM tackle takes it much further:

• LED light sticks. Japanese-style LED sticks from our LED light stick collection clip above your rig or under a float, putting a glowing beacon right where you want fish to look. They run on Panasonic pin-type 3 V lithium batteries — carry spares.
• Glow heads and glow paint. Recharge tenya heads regularly; a freshly charged head out-fishes a faded one.
• Berley. A slow, steady trail of chopped pilchard drifting down through the water column pulls bait — and the hairtail hunting it — up under the boat and holds them there.

The combination — light, glow, scent — turns a patch of dark water into a feeding station.

Hairtail Lure Fishing: Metal Jigs After Dark

Tenya is the headline act, but hairtail lure fishing with small metals is a brilliant second string — especially for covering water while the berley trail builds.

• Jigs: compact, slow-falling metals in the 40–80 g range with glow or zebra-glow finishes are the classic tachiuo choice. Something like the Little Jack Metal Adict 05 in 60 g has exactly that profile — let it flutter down through the strike zone, then retrieve with slow lifts and controlled drops. Most hits come on the fall.
• Protect your connection: fish slashing at a falling jig will find your leader eventually. A wire-cored assist rig solves it — Gamakatsu's purpose-built hairtail tenya wire assist hooks (below) swap straight onto a jig or tenya and shrug off the teeth.
• Related reading: if working metals in deep water appeals, our new guide to offshore slow pitch jigging with JDM tackle covers the fluttering-fall craft in full.

Land-Based Hairtail: Wharves, Bridges and Jetties

No boat? You are not locked out of this fishery. The same method scales down to any land-based platform over deep water — wharves, jetties and bridges over the deeper reaches of hairtail systems all reach the strike zone after dark. Structure puts you over depth without a sounder, and any nearby lighting draws baitfish and the predators hunting them.

Fish it as you would from the boat: a tenya slow-wound through the layers, or a pilchard suspended under a glow stick with just enough ball sinker to hold it down in the current. Work deeper with each cast until you find fish. Expect company, too — tailor will happily crash a pilchard after dark, and their rattling bite feels similar until the ticking follow gives the hairtail away. Travel light, keep the noise down, and have your net and long-nose pliers within reach; hoisting a metre of thrashing chrome up a wharf ladder in the dark is not the moment to improvise.

Handling, Eating and Staying Safe

Everything about a hairtail says "mind the front end". Once a fish hits the deck:

• Never lip-grip or comfort-grip one. Grab firmly behind the head, or better, use a landing net and long-nose pliers for unhooking. Those fangs slice tackle and fingers with equal enthusiasm.
• Watch the flapping ribbon. The body whips; keep it away from bare ankles in the dark.
• On ice, quickly. Hairtail are a genuinely high-quality table fish — in Japan tachiuo is premium eating, salt-grilled, tempura-fried or served as sashimi from the freshest fish. The flesh is white, delicate and sweet, and cold-water fish are in prime condition. Bleed and ice your keepers straight away, and check the current NSW DPI bag and size rules before you fish.
• Winter-night sense. Cold air over cold water is unforgiving. Lifejackets on, nav lights working, and if you push out toward exposed water or fish from the stones instead, remember NSW's lifejacket requirements for rock fishing in declared areas.

Your Winter Game Plan

Here is the short version. Pick a cold, dark night in the May–August window. Anchor over a deep, sheltered hole after sunset. Get berley and lights working early. Start with a tenya slow-wound through the layers until you find the depth, keep a jig rod rigged for casting, and swap to wire the moment bite-offs start. Hairtail are the sort of fishery where preparation meets luck — but when the run is on, there is nothing else in Sydney like it.

The best part? You will almost certainly be the only boat on the water fishing genuine tachiuo tenya tackle, backed by an Australian warranty rather than a grey-import gamble. Round out your cold-season plans with our guide to winter fishing in Sydney — luderick, tuna and deep-water species.

Tight lines — and keep your fingers away from the pointy end.

FAQ: Hairtail (Tachiuo) Fishing in Sydney

Q1: When is hairtail season in Sydney?

Hairtail show in Sydney's deep, sheltered estuary waters through the colder months — roughly May to August. The run is famously erratic: some winters produce fish for weeks, others barely at all. Cold-water years fishing deep holes at night give you the best odds.

Q2: What is a tenya rig for hairtail?

A tenya is a Japanese weighted jig head with fixed upward-facing hooks and usually a glow-painted head. A whole baitfish, such as a pilchard, is lashed to the shank with fine keeper wire so the bait survives repeated slashing bites. It is the premier tachiuo technique in Japan, fished with a slow, steady retrieve.

Q3: Do I need a wire leader for hairtail?

Not always, but carry one. Many anglers start with a short trace of very heavy nylon (around 50 lb-plus), which draws more bites, and switch to a short wire trace once fish are biting hard or bite-offs begin. Hairtail teeth shear light monofilament instantly, so a standard leader alone will cost you rigs.

Q4: Can you catch hairtail on lures?

Yes — hairtail lure fishing with compact 40–80 g metal jigs in glow finishes is very effective at night, with most strikes coming as the jig flutters down. Use a slow lift-and-drop retrieve and protect the connection with wire or a wire-cored assist hook.

Q5: Are hairtail good to eat?

Excellent. In Japan, tachiuo is a prized table fish — salt-grilled, fried as tempura or eaten as sashimi when very fresh. The flesh is white, fine and sweet. Bleed and ice fish immediately, and check current NSW DPI limits before keeping a feed.