Hello.
Instead of face-to-face classroom, online classes is starting in many colleges in Japan. One concideration is a fee of mobile data sim for students.
In japan, the three major carrers provide special plans for students.
DoCoMo: https://www.nttdocomo.co.jp/info/notice/page/200403_00.html
au : https://news.kddi.com/kddi/corporate/newsrelease/2020/04/03/4364.html
softbank : https://www.softbank.jp/corp/news/info/2020/20200403_01/
I heard that data trafics on the internet have been doubled or more these days. And also I heard that some video related services have limited their traffics to send streaming data.