noun
hobby friend; friend through shared interests
Colloquial noun for a friend made through common hobbies, tastes, or personality. Often used in casual conversation, especially among younger speakers.
See also: 類は友を呼ぶ
彼とは趣味が合うから、すぐに類友になった。
We share the same hobbies, so we quickly became hobby friends.
SNSで類友を見つけるのは簡単だ。
It's easy to find friends with common interests on social media.