Why is South Korea asking for US intervention in its July 2019 diplomatic and trade dispute with Japan?

https://www.quora.com/Why-is-South-Korea-asking-for-US-intervention-in-its-July-2019-diplomatic-and-trade-dispute-with-Japan/answer/%E6%A1%91%E7%94%B0-%E5%81%A5%E5%8F%B8-Kuwata-Kenji?prompt_topic_bio=1

Mom, I pooped. You should wipe my hole. This is my poop.

South Korean Firms Violate International Controls on Shipping Materials for WMDs to Iran and Syria | JAPAN Forward

Mom knows because Mom talked with everyone at G20.