Translation guide
The term "social brain" refers to the hypothesis that the human brain evolved to handle complex social interactions. In Japanese, it is typically expressed using the direct translation 社会脳 (shakai nō) in academic contexts, or explained descriptively.
The social brain hypothesis explains the evolution of the primate brain.
A slightly more descriptive variant, literally 'social brain'. Less common than 社会脳 but still used.
The human social brain processes complex interpersonal relationships.
Talking about the parts of the brain involved in social cognition, empathy, theory of mind, etc.
Same term as above, but used in broader contexts beyond the strict evolutionary hypothesis. Often appears in popular science.
Training your social brain can improve your communication skills.
Literally 'brain of sociality'. Used to emphasize the social nature of the brain.
Describing someone who is good at socializing, reading social cues, or navigating social situations.
There is no direct equivalent for 'social brain' as a personality trait. Instead, describe the person's social skills.
He's a real social brain. (He's a very sociable person.)
She has a social brain. (She's good at reading interpersonal relationships.)
Means 'sociable' or 'outgoing'. Can be used to describe someone with a 'social brain' in the sense of enjoying social interaction.
Do not use 社会脳 (shakai nō) to describe a person who is socially skilled. It sounds like you are calling them a scientific concept, not a person. Use 社交的 (shakōteki) or descriptive phrases instead.
In autism research, the functioning of the social brain is a focus.
He's very social and quickly becomes friends with anyone.