in recent years, the company began emphasizing its saury products.spent millions of dollars installing a high-temperature, high-pressure processing system in a state of the artifactry. but since then local catches of saury have drastically declined. >> translator: some people wonder why we can't just sell different fish. but you can't so easily repurpose your entire facility. >> reporter: the poor hauls of saury have put local fishermen in a desperate situation. as a result, some have switched their focus to yellowtail. the fish used to be a rare sight in hokkaido and is of lower value. each ship can carry over ten tons of yellowtail. to preserve freshness and add value, the fishermen drain the blood from every fish as soon as it's landed. local officials have launched promotions showing people various ways to cook and eat yellowtail. >> translator: the meat is so thick and juicy that it's hard to believe it's fish. it's very delicious. >> reporter: the warmer oceans continues to threaten japan's northern fisheries. adapting to dramatic shifts in the