a Japanese forum seem to realize Kumi has a large overseas fan base. They reposted the "WON'T BE SHORT" Kuu single joke featuring Arashi and mentioned how it came from our side
a lot of people said "I want this to happen!!"
they also had a lot to say about rum that my friend translated
Spoiler:
「we are all praying for the angel of Rum, please stay strong Kuu chan.」
「my chest hurts for her, I feel touched that Kumi was professional and strong about it when she really wanted to cry」
「rest in piece rumchan. a gift from god, you came 10 years ago and watched over Kumiko all this time. you were there to make her happy when she was sad, so your memories live on in our hearts and in her smile.」 <-
「kumi, you are sad about rumchan but not alone, rumchan is also mourned by fans as well who loved him.」
「I am listening to WIND and finding it hard not to cry」 <-

(Rum was a big part of the PV)
someone mentioned that Kumi was crying a lot during the end of her album's production and apologizing to the staff for delaying, and now we know why.