Tangentially, I've seen "Nomu-nication" (Nomu "to drink" and Communication) be a central part of almost all business in Japan -- both internal and external.
One experience I had with my Osakan clients always stood out to me -- I've met multiple businessmen who say they won't make a deal with a vendor they haven't gone drinking with, because the alcohol shows what kind of person they really are.
One experience I had with my Osakan clients always stood out to me -- I've met multiple businessmen who say they won't make a deal with a vendor they haven't gone drinking with, because the alcohol shows what kind of person they really are.