https://koenji.keizai.biz/headline/1173/

https://blog.itokoichi.com/entry/2020/05/02/180000

https://smhn.info/202005-the-worlds-three-largest-manufacturers-were-hit-hard

https://rocketnews24.com/2020/05/02/1365715/

https://japan.cnet.com/article/35153250/

https://akiba-pc.watch.impress.co.jp/docs/wakiba/find/1250737.html

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