Sophistication of Aquaculture

Nissui will protect marine ecological systems and aim for the sustainable use of marine resources.

Preserving biodiversity is a significant mission for the Nissui Group, whose business foundations comprise marine products, which are benefits of the sea and the earth. The Nissui Group has articulated the preservation of biodiversity in the Policies of its Environmental Code and is aiming for the sustainable use of marine resources that harmonizes with marine ecological systems.

Promoting complete aquaculture

Nissui is developing sophisticated aquaculture technology to minimize its impact on the marine ecological systems.

Initiatives in the complete aquaculture of yellowtail

“Complete aquaculture” refers to the process of raising juvenile fish (artificial seedlings) spawned from eggs harvested from farmed parent fish, and once again harvesting eggs from the cultivated fish once they have matured.
Unlike conventional aquaculture, which catches natural juvenile fish, complete aquaculture makes it possible to farm fish independently of the ecological system.
Kurose Suisan Co., Ltd. of the Nissui Group has been promoting the cultivation of artificial yellowtail seedlings and has become the first in Japan to successfully commercialize the complete aquaculture of yellowtail. However, most noteworthy is Kurose Suisan’s efforts to prevent the farmed fish from escaping by such means as the use of woven wire cages. Should a farmed yellowtail escape and mate with a natural yellowtail, it could impact the genetic composition of the species.
Kurose Suisan by mitigating the burden on the ecological system is playing its part in conserving biodiversity.
A new artificial seedling center has been established by the Nissui Group in Minamikyushu City, Kagoshima Prefecture and complete aquaculture is already under way. Yellowtail raised under complete aquaculture is shipped as “Wakaburi” during the changeover period when the supply of regular farmed yellowtail becomes scarce. Thanks to the success of Wakaburi,” Nissui has been able to further promote complete aquaculture which does not burden the ecological system.

photo:Promoting complete aquaculture Nissui has improved the breeding of artificial seedling and is making efforts to reduce the risks of fish diseases by producing seedlings from healthy parent fish, cultivating healthy seedlings and vaccination.

Nissui is accelerating the development of its aquaculture technology in various fish species

The Nissui Group’s sophisticated aquaculture technology is not limited to yellowtail. In Kushimoto, Wakayama Prefecture, the Group is accelerating the development of artificial bluefin tuna seedlings and aiming to realize complete aquaculture. In Karatsu, Saga Prefecture, thanks to the operation of a plant producing formula feed for bluefin tuna, it is no longer necessary to use whole fish as feed, which, in turn, has made it possible to conduct aquaculture that leaves a minimal footprint on the aquatic environment.

Furthermore, Nissui is promoting the development of sophisticated aquaculture technology for other fish species including salmon and blowfish. It is engaged in bringing about innovations to reduce the environmental footprint of commercial aquaculture on the marine ecological systems through spontaneous feeding systems, which provide fish with the right amount of feed exactly when the fish want to be fed, preventing contamination of the water, and through the study of on shore aquaculture using tanks.

Initiatives toward ASC certification, which ensures sustainable commercial aquaculture

ASC certification* refers to the third-party certification system launched in 2010 by such organizations as the WWF (World Wide Fund for Nature) to ensure the sustainability of commercial aquaculture. The ASC holds roundtables to set standards for measuring the impact of aquaculture on the environment, and Kurose Suisan and Nissui took part in the sessions for yellowtail. Kurose Suisan is aiming to become the first operator in Japan to clear ASC’s stringent standards and receive ASC certification.

For aquaculture operators, conserving the marine environment is indispensable for its business continuity, and to that end, the conservation of biodiversity is a major task that needs to be addressed. The Nissui Group will continue to engage in aquaculture that gives due consideration to biodiversity, also for the purpose of ensuring a stable food supply.

*ASC (Aquaculture Stewardship Council) certification

Aquaculture of salmon and yellowtail in harmony with the ecosystem

The Nissui Group is promoting the development of a sophisticated aquaculture technology that will lessen the environmental footprint on marine ecological systems. In December 2013, a Nissui Group company commenced its full-scale salmon aquaculture operations in Sakaiminato, Tottori Prefecture. The salmon, which are being raised from juvenile fish under an integrated system and marketed under the brand name, Sakaiminato Salmon, have become a new source for the supply of marine resources.

Kurose Suisan Co., Ltd. of the Nissui Group has become the first in Japan to successfully commercialize the complete aquaculture of yellowtail. Juvenile fish (artificial seedlings) spawned from eggs harvested from farmed parent fish are raised, and eggs are harvested once again from the cultivated fish once they have matured. Unlike conventional aquaculture, which catches natural juvenile fish, complete aquaculture makes it possible to farm fish independently of the ecological system.

Furthermore, the Nissui Group is promoting innovations in aquaculture technology, including the use of formula feed instead of live bait, to reduce the impact on the marine environment

Supporting research activities that look toward the future of marine resources

Additionally, the Nissui Group supports the research activities of the Society for Conservation of Fisheries Resources and Marine Environment (CoFRaME). CoFRaME conducts a broad range of research activities to ensure the sustainable utilization of marine resources. Research results are presented at academic meetings and as academic papers, and are expected to impact the policies of marine resources conservation. The Nissui Group, by employing scientific research, will protect biodiversity and ensure the sustainable utilization of marine resources from a global perspective.