Kudos on all these detailed analysis of the meanings man, really appreciate it.
FashionablenessCool Bi"zu"
The word "Kurubizu(cool business)" is a policy in Japan which encourages the white-collar dress in a more casual and cool way to work, instead of the hot and uncomfortable formal suit. They believe that this could reduce the electricity fee in summer.Back Water Formation
A classical army formation which means "Fight or Death are the only two choices given", it could encourge the soldier to fight bravely(Since they may have to die in both ways, to die on the battlefield could be more honorable.)