^ some say it was not until the 80's ended that rei and adrian started dating. but I don't know anything about it myself.
it seems that 1987 was when adrian joined CdG paris as a commercial director (homme plus, specifically). he quit the job once, to start a new one at club med.
and at the request from rei , he returned in 1992.
although I don't know how many starting over's yohji and rei had had, YY and CdG were the buddy system. for example, in the 70's they decided together how their clothes should appear in magazines, which magazine it should be, etc.
the same textile designer (hiroshi matsushita) was working exclusively for them.
as you suggest, in tokyo their collections ( FW1991 june pour homme and homme plus) were shown jointly on the same runway. (I'm not sure if yohji fought lightly with john lurie who was there as a model because he was being a bit uptight due to adrian thing. and yes you can tell they are thinking they are in a crisis if they are back and show their presence in tokyo, like FW1994 april CdG/homme plus joint show, FW2010 april pour homme, etc.
also in the midst of the pandemic rei appeared in three news programs and had interviews. what she had never done before.)
and according to yohji himself his debut in paris was like this:
"The store opened in April 1981, and all of the products were exported from Japan.
Our arrival in Paris was a great opportunity, so we decided to hold a floor show as well. For my part, I wanted Rei Kawakubo of Comme des Garçons to go together to Paris at around the same time. Since Y's and Comme des Garçons were both considered avant-garde, I thought it would be more effective to collaborate for our debut in Paris, just as we had done in Japan.
But I did not know what Kawakubo's intentions were. She may have been thinking it was too early to make her debut in Paris.
In any event, I decided to move ahead alone. I followed the advance team and began to prepare the store and show. I never dreamed that our Paris debut would later become a major event that would shake the entire world of fashion.
As I was preparing for my prêt-à-porter debut in Paris in April 1981, I decided to ensure that the collection would be devoid of any taste or flavor of Japanese culture. I was determined not to use any element Japanese fashion designers tended to use casually in their clothes, such as straight-line cutting and kimono patterns.
A "nonconformist," I was loath to do anything designed to go down well with foreigners. I only used European-style structural designs and cuts, adopting vinyl and urethane as their materials.
Since I had not yet built a working relationship with overseas media nor issued any media announcement about my Paris debut, I did not expect my show to attract a large audience. But some buyers dropped in to see the collection. One of them was Barbara Weiser, the daughter of Selma Weiser, who founded Charivari, a fashion boutique in New York. She told me that Comme des Garçons' Rei Kawakubo was also staging a show at a different venue in Paris.
The news surprised me and lifted my spirits.
My guess is that Kawakubo made a sudden decision to debut her collection in Paris and staged her show with a flurry of activity. It was a coincidence that Kawakubo and I burst onto the Paris fashion scene at the same time, but our unintentionally synchronized foray into the French capital had a huge impact on the world of fashion. Our collections attracted a lot of media attention."
"It is strange, but from the moment I first saw the clothes of Comme des Garçons, I felt they had a common aesthetic and philosophy with Y's. On the sales floor, the tasteful clothes as if they had been carefully stored in a wicker drawer were lined up randomly.
Kawakubo's sensibility was close to my own in terms of use of color and materials. Or rather, I thought hers might be stronger and clearer than my own.
As a result, Y's and Comme des Garçons were grouped together in the "avant-garde" genre and often opened stores next to each other. From the perspective of a distributor choosing brands, this would probably have a greater impact on the store's sales strategy."
from nikkei