友とも達だち甲斐がい

noun

true friendship; the value of having a friend

Refers to the worth, benefit, or fulfillment gained from a friendship; often used in expressions like 友達甲斐がない (not worth being friends with) or 友達甲斐のある (a friend worth having).

• 彼かれは本ほん当とうに友とも達だち甲が斐いのある人ひとだ。

  He is truly a friend worth having.

• あんなことをするなんて、友とも達だち甲が斐いがない。

  Doing something like that makes him not worth being friends with.