While Musk has mentioned the trip in two posts since leaving, he didn't tweet once while in China
That disruption, which comes amid a shortage of semiconductors that is already forcing it to curb output, could cut production plans this month by about 47,000 vehicles, a Toyota spokesperson said.
Toyota on Tuesday said it expects to fall short of an annual target to build 9 million vehicles because it did not have enough chips. The company's business year ends on March 31.
There has been a surge in cases of the omicron coronavirus variant in Japan since the start of the year. Daily coronavirus cases on Thursday rose to a record 46,199.