Upon reading the article, Inoue says that it's possible to take place the fight on Japan as it was safer compare to the USA once the pandemic virus is now controlled or at least minimizes the confirmed cases.

It looks like he already gave us a hint of information there that Top Rank is considering shifting into another venue rather than to wait for 100% virus-free at the original venue. Although Inoue used the word "Presumably" so maybe just his opinion?

Japan live audiences might not reach the expected revenues that organizers will get in Vegas but as we know, Japan is full support at always on any international venue held on their country. And since it's a home country of Inoue, surely it's gonna be a full pack @ Kōrakuen Hall (this place is the most popular venue for boxing events, also regularly featured as the main event place in the boxing anime 'Hajime No Ippo').