Freshwater · Spring breeding colours best; tanago fishing year-round in lowland streams and ponds

Yaritanago Bitterling

Tanakia lanceolata

The yaritanago is the face of Japanese tanago micro-fishing, pursued with ultra-fine rods and tiny gourd floats. Breeding males turn vivid with iridescent colour. Like other bitterlings, it lays its eggs inside living freshwater mussels, and related bitterlings such as aburabote and kanehira share the same waters and habits.

Seasons · Peak

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Yaritanago Bitterling — Photo: Totti, CC BY-SA 4.0 — Wikimedia Commons

Identifying features

Small, deep, strongly compressed silvery body
Dark vertical bar behind the gill cover and a stripe along the flank
Breeding males show iridescent blue-green and pink colour
Long dorsal fin base compared with other small cyprinids
Complete lateral line running the length of the flank

Habits

Lays eggs inside freshwater mussels via the female's ovipositor
Feeds on algae, detritus and tiny invertebrates
Males guard mussels and display in spring breeding season
Shares habitat with related bitterlings such as aburabote and kanehira
Stays in slow, weedy lowland water year-round

Distribution

Regional coverage expanding

Where to find them

Lowland channels around Lake Kasumigaura
Tone River system irrigation ditches and creeks
Canals on the Lake Biwa plain

Where they live

Slow lowland streams, irrigation channels and ditchesPond and lake margins with freshwater mussels in the bedWeedy backwaters with soft mud and gentle flow

How to catch them

Tanago micro-fishing in lowland streams River

Rig: Ultra-fine tanago rod with a gourd float, tiny hook and split shot in slow channels

Bait/lure: Pinhead of gluten bait

Key tip: Fish inches from the float and strike at the slightest dip; tackle is measured in centimetres, not metres.

Pond-margin micro-fishing Lake

Rig: Short fine rod and small float rig over mussel beds at pond and lake margins

Bait/lure: Tiny bait paste or a single maggot

Key tip: Work the rig slowly over soft beds where mussels live; keep every fish wet and release it quickly.

Best baits & lures

Tiny gluten dough bait (guruten)Single maggot or tiny worm pieceFine commercial tanago bait paste

Techniques for Yaritanago Bitterling →

Baseline setup

Rod: Ultra-light tanago rod 3-5 ft (0.9-1.5 m)
Line: 1-2 lb mono or fine tanago line
Terminal: Gourd floats, micro split shot and size 20+ hooks

Recommended gear for this species

Rod · Best value

9' 5-weight fly rod outfit

≈ US$180-260

Covers chironomid lakes and small rivers with one setup.

Flies · Budget

Chironomid assortment (30 patterns)

≈ US$25-40

Chironomids are 60% of a lake rainbow's diet in spring.

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

Typical size

Common 2-3 in (5-8 cm); large fish to about 4 in (10 cm)

On the table

Not a food fish — a prized micro-fishing target, photographed and released.

Similar species

GinbunaGinbuna is a much larger, plain silver crucian carp; yaritanago is tiny and deep-bodied, with a dark gill bar and vivid breeding males

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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