悪友[akuyuu] undesirable friend
畏友[iyuu] one's esteemed friend
益友[ekiyuu] good friend
学友[gakuyuu] school friend
級友[kyuuyuu] classmate

旧友[kyuuyuu] crony
血友病[ketsuyuubyou] haemophilia
交友[kouyuu] friend
交友関係[kouyuukankei] one's relationships
校友[kouyuu] schoolmate

哀情[aijou] sadness
愛情[aijou] love
遺伝情報[idenjouhou] genetic information
恩情[onjou] compassion
温情[onjou] warm heart

下情[kajou] condition of the common people
我情[gajou] selfishness
各情報[kakujouhou] all information
感情[kanjou] emotion
感情移入[kanjouinyuu] empathy