Well, it is what the title says. コロナウイルス is forcing people to stay home in Japan and the japs have a nice philosophy of spreading hope in times of despair, so they went there and performed anyway and are being nice and posting the gigs that got cancelled online for all to see, including us, poor gaijin. No live audience, no staff, etc.
These are the ones I've seen so far:
Let's make this collaborative so do share other links here if you