AIZU-WAKAMATSU, Japan—Haruyasu Miyabe used to oversee a computer-chip production line at a Fujitsu Ltd. 6702.TO +0.26% plant here. One day last year, the plant manager told Mr. Miyabe to prepare for a career change.
"Starting tomorrow, you are going to make lettuce," he recalls being told.
Amid troubled times in the Japanese electronics industry, Fujitsu shut one of the three chip-making lines at the plant in 2009. Now, in a sterile, dust-free clean room that once built the brains of high-tech gadgets, Mr. Miyabe and a staff of about 30 tend heads of lettuce.
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