Japanese bird-fishing struggling to adapt to environmental shifts that threaten ancient tradition

The Japanese tradition of ukai, which uses trained seabirds to catch ayu or sweetfish, is under increasing threat from environmental changes. Some are trying to keep the 1,300-year-old practice alive. But Yoichiro Adachi, an 18th-generation cormorant fisherman, says a shrinking catch has forced many to look for other ways to supplement their income.