This has been on my mind for awhile now, and i've waited years for the Japanese idols in Kpop to form their own club of sorts. We've seen Thai idols hanging out together socially, we've seen Chinese and Chinese speaking idols hanging out socially, but when was the last social outing selfie or video between Japanese idols from different groups?
Nako was a huge fan of Twice but i never saw a single pic of her and the Twice J line. Same with Sakura and Twice. I've seen Mina hanging out with Minnie and Lisa, i've seen Sana hanging out with Miyeon, etc. But what about Rei from Ive, Tsuki from Billlie (i know she appeared with Sakura on Knowing Bros but i consider that work related and it was clear they just met), Giselle from Aespa, and probably a dozen other Japanese Kpop idols....i never see them hanging out having dinner or drinks together. 
The only exception i can think of is Juri from Rocket Punch and Sakura. Technically, her appearance on Sakura's YT variety show was work related, but it was clear from their discussion that they see each other socially when they have time. This is the only intergroup Japanese Kpop idol friendship that i can recall right now. But my memory is shot these days, so if there are some obvious ones i've missed please let me know.
. Than Shogo of 
BPHouse paving the way.
