AFP:
The variety of juicy grape ... took scientists 33 years to develop and can sell for $100 a bunch in Tokyo department stores.
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According to the Japanese government, China and South Korea took Shine Muscat seedlings out of Japan and grafted them onto local vines to produce fruit that looks and tastes -- almost -- as good.
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Japan cannot stop China or South Korea from growing the fruit because Tokyo -- some say naively -- failed to register the variety overseas within the six years required under international rules.
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Japan cannot export grapes to China itself because of Beijing's quarantine rules, so Chinese growers are not technically cannibalising Japanese sales.