The automatic translation got it right. It did say 6.1M.

I’m sure a lot of kpop fans joined in. It’s not that crazy of a number

6 million isn't a lot...there's like 4 billion people inAsia

For V-Live at least, we never got to see how many people were watching only the comments from people and 'hearts' they had given.

Looking at the link, I think they're a bit confusing in the description because that is the number they have used for the last year as cumulative for all a-nations since 2002. It's not meant to be the number for just this a-nation. I remembered that they have been publicizing that it's a summer festival that has gathered about 6 million in audience since its start though.

from Twitter

So over the course of the last 18 years that is where the 6.1 million comes from. It is NOT for this year's 2020 show. I don't think we'll get numbers for online a-nation, maybe not at all but if they were good enough we'll probably see it.

6.1 Million people for a live stram would be one of the biggest live streams. Even more surprising for a paid one.

That's make way more sense.

I do think a large amount of people were watching at least, more than we think mostly from K-pop fans and from the high amount of hearts/likes for acts like Da-icE. Many were on mu-mo Live within Japan from what we saw, comments were a lot faster than on V-Live.

^I wouldn't be surprised if Ayu got a significative amount of views from people who just stayed till the end because they had already paid for it.

Eh, honestly, a lot of people had checked out after the Korean acts were done, lol. After SuperM was done, it was mostly Ayu fans that came out of the woodwork after a ton of SuperM spam.

^Even at any normal a-nation, LOTS of people leave after the big k-pop acts have finished and they don't care to stay for Ayu anymore. Would surprise me if k-pop fans would bother to stay for an online live when they even paid less and it's just a click in order to leave.

And since Ayu's performance was at the same time of SUPER JUNIOR, which was right after SuperM, I wouldn't be surprised if a good portion just changed to the green stage.

her voice was so good during this show! i LOVE how she sang vogue, her voice is so relaxing. I would love a rerecording of her singing it like that in an acoustic/orchestra mix <3 she also looked amazing. definitely one of her better a-nations!

This was hands down the best performance she delivered for a LONG time!
Her voice was perfect from beginning to end, the outfits were gorgeous, and she seemed to fully enjoy being on stage!
Made me like vogue again (never been a fan of this song) - the fans choreography was everything!
YAY Ayu! Hope she keeps it up.

I'm slightly confused by Startin'. Why are the backing singers pretending to sing even though it's clearly not their vocals?

Ayu's voice sounds consistent throughout though. That's nice.

I was amazed by Ayu's vocals - she did such a good job! Was so nice to see her do Far Away too!

I'm a bit late to the party, just wanted to say ayu impressed me once more! She hit some damn notes.

I'm sure it's not just her resting her voice. She must have prepared for her "return" taking a vocal coach once again.
Sometimes it even feel effortless like the old days. She gained so much control.

This a nation didn't disappoint at so many levels.

I think it's a combo of rest along with training of some sort. There's a good difference between this and Natsu no Trouble for instance. It's very nice to hear and I hope it continues to get better!