話はなしのたね

noun

topic of conversation; something to talk about

Refers to a subject or material that provides a basis for conversation, often used when something interesting or noteworthy happens.

• 旅りょ行こうの話はなしのたねに、お土産みやげを買かってきた。

  I bought souvenirs to have something to talk about from my trip.

• 彼かれの失しっ敗ぱいがいい話はなしのたねになった。

  His mistake became a good topic of conversation.