TOKYO -- An unprecedented red tide in Hokkaido has contributed to huge numbers of sea urchin and salmon dying, driving up the price of these fixtures in traditional Japanese New Year's cooking.
Die-off linked to record heat seen affecting supplies for years to come

Shells of dead sea urchins washed ashore in the Hokkaido town of Erimo.
TOKYO -- An unprecedented red tide in Hokkaido has contributed to huge numbers of sea urchin and salmon dying, driving up the price of these fixtures in traditional Japanese New Year's cooking.