According to the book, Japonius Tyrannus, kickball had been an aristocratic pastime since the late Heian period (794-1185) and surprisingly Nobunaga, a passionate hunter and sumo fan, displayed an interest in this rather static and ceremonial sport.
Nobunaga actively involved himself with the court such as in 1575 when he organised a match between leading nobles at the grounds of the temple Shokokuji. Nobunaga used these matches as well as the Tea Ceremony to establish or strengthen political bonds, or to associate with people from outside the warrior class: with merchants in the case of tea, and with nobles in the case of kickball.
The kickball matches also allowed Nobunaga to famliarize himself with the various court nobles. At the time, one of the players, Asukai Masanori (1520-94), served as Crown Prince Sanehito's special envoy to Nobunaga. The Asukai family had earned a dominant position as 'masters of kickball' in the Muromachi period (1336 to 1573), thanks to the sponsorship of successive emperors and the Ashikaga shoguns. Nobunaga continued this shogunal sponsorship of the Asukai, even calling himself Masanori's 'kickball pupil' on one occasion.
I think it would have been pretty cool to have played kickball with the great warlord Nobunaga. I would be careful to always let him win of course.