BART reduces services and redeploys staff to capital projects as ridership drops to 7%
https://www.railwaygazette.com/metros/bart-reduces-services-and-redeploys-staff-to-capital-projects-as-ridership-drops-to-7/56209.article
San Francisco is under strict restriction of going out. So, I can understand the number of the passengers fell by 93% , and then decided to reduce train frequency by half or more.
But, in Japan, there are still many people who cannot be absent from office or be unable to work at home. It's difficult for train operators to reduce trains in the morning and in the evening.