Japan's Oyster Crisis: Mass Die-Offs Threaten Livelihoods and Cuisine

Japan's oyster industry is facing a severe crisis as a mass die-off of oysters in the country's Hiroshima prefecture threatens the livelihoods of local fishermen and the national cuisine. The die-off, which has resulted in up to 90% of oysters dying in some areas, is attributed to a combination of rising sea temperatures and a brutally hot summer last year.

The oyster industry in Hiroshima accounts for almost two-thirds of Japan's supply of farmed oysters, producing 89,000 tons of the shellfish in 2023. The industry's struggles have prompted the government to step in with support measures, including five-year government loans at virtually zero interest and access to mutual aid programs for aquaculture businesses.

Experts warn that mass die-offs could become more common due to climate change and global warming. 'It's difficult to put the brakes on climate change,' says Kazuhiko Koike, a professor at Hiroshima University. 'But if the rainy season ends early again with little rainfall, and is followed by prolonged high temperatures and hot weather, this could mean that low oxygen levels and food shortages will occur again.'

The crisis has significant implications for local businesses and consumers, with oyster's being a popular Japanese dish. 'This is something out of the ordinary,' says Taketoshi Niina, a fishery owner in Kure. 'A lot of those that do survive are in poor condition … they are not of a high enough quality to sell to shops and restaurants.'