CommoditiesJapan seeks Asian partnerships to build more resilient supply chainsJapanese companies primarily produce chemicals using naphtha, at large complexes like these that line Tokyo Bay in Chiba prefecture. (Photo by Tomoki Mera)EMI OKADAJune 11, 2026 23:10 JSTTOKYO -- Japan, South Korea and other big Asian economies have been dealt a blow by the Iran war's disruption of naphtha imports -- all except China, which has weathered the crisis thanks to its diversified supply networks.