NA Localization:
A return gift from Oda Kippoushi.
A gourd that Kippoushi carried around on their hip when they were considered nothing more than a laughing stock by the other daimyo, and bore the moniker of the Fool of Owari. There's no particular history behind it; it's just an ordinary black gourd.
During this time, Nobunaga was noted to wear eccentric clothing while hanging around the castle town. Those who derided them as a fool, those who realized their actual intent...it's unclear what Nobunaga's true objective was, but the Fool of Owari's legend began here.
Wahahahaha! Now you are the Fool of Chaldea!
Fan Translation:
Return gift from Oda Kippōshi.
The gourd that Kippōshi hung on his waist, which he was often seen with it when he became the laughing stock for many Daimyō as the Fool of Owari. It is a very ordinary black gourd that doesn't have any special origin whatsoever.
During this period, Nobunaga deliberately dressed in an eccentric fashion and frequently paraded around the castle town. While even those who looked down on him as a fool, and those who realized the meaning of that action weren't sure about his true motives, all that is of the Fool of Owari started thence.
Wahahahahaha! You are also the Fool of Chaldea, aren't ya!