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Two former "dispatch" workers at a unit of the Japanese appliance giant are suing the firm.
While fighting his case, he lives with his wife and two children in public housing, barely getting by on a 150,000 yen ($1,600) a month job.
"Violating the dispatch law means buying and selling people," he said. "Many people have been through similar things as me — why aren't they getting more angry about it?"
Panasonic Ecosystems is a wholly-owned subsidiary of the Panasonic Group, which declined comment for this article, saying it was company policy not to comment on pending litigation.
It also declined to provide details on its workforce or to respond to criticism about its use of temp workers.
Temp Nation the series: