Phiggs88, that article makes it seem like foreign
Post# of 22456
https://www.nitto.com/us/en/about_us/access/eastasia/
Sumitomo, the first company in the article is a more diversified company and I count 11 regional offices alone in China, so probably many more manufacturing sites there.
http://www.sumitomocorp.co.jp/english/company/point/easia/
Transportation charges, on-demand inventory delivery, Customs procedures and unreliable changing tariffs make having a local factory necessary to supply manufacturers.