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Main building

　This building was built at 1966.  There are office, room for biochemical experiments, and library in it.  Half of this building is breeding room to incubate fertilized eggs and to rear young fish.

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Office

　All staffs and students work in this room.

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Room for biochemical experiments

Thermal cycler, FCM (flow-cytometer), incubator, electrophoresis, absorption-photometer, clean-bench and others are available.

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Breeding room using well water

　In this room, fertilized eggs and young fish were reared using well water.  Hatching tanks incubate fertilized eggs.  Young fish were kept in high-density aquariums.

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Breeding room at high temperature

　Aquariums are filtered independently.  The temperature of room is kept at around 20℃ by oil heater.

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Breeding system for small-sized fish

　

Small-sized cyprinid species, such as Danioninae fish, are reared in aquarium system. Temperature-controlled (26℃) water is circulated and filtrated in the connected aquariums. Gametes are available in all season.

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Breeding aquariums for medium-sized fish

　Medium-sized cyprinid species, such as goldfish, and artificially manipulated fish are reared in aquariums.  Aquariums are filtrated independently.

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Outdoor ponds

　Pre-matured young salmonid fish are moved to outdoor ponds to induce maturation under natural river-water condition.   Their bodies change original brilliant color under the natural day-light and water temperature condition.  Sturgeons are reared in circular assembly-type aquariums supplied with river water.  Stocks of parent goldfish population are reared in the 1 m3 plastic tanks with standing water settled in greenhouses.

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Circular ponds

　Parent fish in Salmonid species are reared in the circular ponds supplied with river water.  The water flows in a circular direction and is removed from the tank center, which prevents the accumulation of debris.  This flow is also thought to reduce contact between individuals, activate their immune systems and improve their flesh quality.  Natural water temperature induces maturation almost naturally, resulting that the eggs with good developmental quality are obtained around optimum spawning season.

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Circular aquariums

　Young fish in Salmonid species are moved to the outdoor circular aquariums supplied with well water.  After 2 to 3 years, they grow pre-matured fish to 30 cm in body length.

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Circular assembly-type aquariums

Matured and pre-matured sturgeons are aqua-cultured in circular assembly-type aquariums supplied with river water.  These are provided to users as rental aquariums as necessary.

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Greenhouses

　Fertilized eggs in sturgeon are cultivated in special chambers supplied with well water in greenhouses.  Hatched fingerlings and small juveniles are also reared in rectangular tanks supplied with temperature-controlled well water.

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Hatching room

　This is the oldest building in this Station constructed at 1959.  At that time, there were three rooms for breeding, student training and feed preparation.  In breeding room, propagation of Salvelinus species was performed.  Now, research experiments, such as manipulation of embryos and histological experiment, are performed in the student training and feed-preparation spaces after the several modifications of room.

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Manipulation room

　French-press for chromosome set manipulation, and micromanipulator and injector are prepared in this room.  As several types of microscopes with optical devices are also prepared, observation and optical analysis are easily performed after embryonic manipulation.  Histological experiments are also available in this room.

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Breeding room

　In this room, river water is available for breeding.  Young fish in Salmonid species are reared under the prolonged day light condition.  Parent goldfish are also reared in temperature-controlled aquariums.  Large number of parent fish stock allows to successive collection of matured eggs.

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