Japan loves robots, but getting them to do human work isn't easy

When a food processing plant that makes potato salad and stews in Hokkaido, Japan’s northernmost island, tried out a robot prototype designed to remove the potatoes’ eyes, the machine was not up to the task.

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The robot’s camera sensors were not sensitive enough to identify every eye. While human hands can roll a potato in every direction, the robot could rotate the vegetables on only one axis, and so failed to dig out many of the blemishes that are toxic to humans. Other perfectly good pieces were carved away.

“Fundamentally, it could not do the work to the standard of humans,” said Akihito Shibayama, a factory manager at Yamazaki Group, which operates the plant in Asahikawa, a midsize city in the middle of Hokkaido where 30 workers process about 15 tons of potatoes a day.

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