Eiraku-sen Golf Balls

[Erikusen] The Senmon "Utsugihara Kassen-ki" says 'Eiraku-sen is the Mizuno-no-mon of Mikawa Province.' The fact that Nobunaga ODA used it at the end of the Sengoku Period (Period of Warring States) is recorded in his family tree ... Because the Oda clan used it as a emblem of their flag and gave it to their subordinates, it seems that the warlords who received it used it as their family crest to commemorate it (written by Yorisuke NUMATA, "Nihon Monshogaku")