Ms Kennedy's message was translated into Japanese and retweeted thousands of times, prompting a backlash by nationalists who resent Western criticism of the cull. "Laughable," wrote one anonymous post to an online bulletin board. "What about the atomic bombing of Hiroshima, the indiscriminate bombings of Japanese cities and US killings in the Middle East?"
Traditionalists say dolphin and whale have been eaten locally for centuries. Restaurants and shops offer dolphin and whale sashimi and blubber, along with tuna and shark-fin soup. Dolphin meat sells for around £6-£10 a pound. Some local fishermen say the cull is necessary to keep dolphins from eating too many fish.
Taiji was exposed to worldwide scrutiny four years ago in the Oscar-winning documentary The Cove, which followed a party of eco-activists as they battled fishermen and police to stop the cull. The documentary was attacked by Japanese ultra-rightists who threatened cinemas that showed it, and by Taiji officials who said the documentary-makers had "psychologically tortured" the fishermen.
The Cove triggered a brief, heated debate in the Japanese media, which had largely ignored the practice until then. Many activists, including the most famous - Ric O'Barry, a former dolphin trainer-turned-campaigner - predicted the global spotlight would end the tradition. "I honestly believe when the world finds out about this it will be abolished," he said.
But the annual cull of about 2,000 small porpoises and dolphins has continued. The former Guns n'Roses drummer Matt Sorum is among the latest high-profile campaigners to visit the town. "In what boats did they chase these dolphins with centuries ago?" he tweeted. "Lies... this has only been in the last 30 years... Greed not tradition."
Last year the local prefecture announced plans to build a marine mammal park where it said tourists would be able swim alongside dolphins and whales, and sample local cuisine - including whale and dolphin meat. The plans drew yet more international flak but Taiji's mayor Kazutaka Sangen was undeterred. "We are not going to change our plans for the town based on the criticism of foreigners," he said.
If anything, Taiji's growing infamy has widened the cultural gulf between the town and the rest of the world. Taiji, which has a population of about 3,000 people, has installed a 24-hour police box to deal with the steady stream of activists making their way to the cove. Locals bristle at the sight of Westerners.
Conservationists say the fishermen have already killed over 170 dolphins and small whales this year and taken 24 captive since the start of the new year. A tweet from a team of activists overlooking the cove said the animals had spent a fourth night without food and would be slaughtered today by a party of about 40 to 60 fishermen.
"I've been here for three years and this is absolutely the largest I've seen driven into the cove," Melissa Sehgal, leader of the Sea Shepherd group, told Australian media.
Ms Kennedy's intervention has again produced a flurry of stories in the Japanese media. The state broadcaster NHK said the ambassador was known as an animal lover and her comments were likely to be taken in that light. "The debate is likely to continue," it said. The message from Mr Sangen was more uncompromising. "The hunting of whales and dolphins has been carried out since long ago and is performed on scientific grounds," he told Japanese reporters last night. "I will protect this tradition."
- UK Independent