na-adjective, noun which may take the genitive case particle 'no'
out of curiosity; for curiosity's sake; sensational
Describes an action or attitude driven purely by curiosity, often with a nuance of lacking deeper purpose or being frivolous. Also used for media content that prioritizes sensationalism over substance.
He started reading the book just out of curiosity.
That magazine has many sensational articles.
好奇心 is a neutral noun for 'curiosity' as a trait, while 興味本位 describes an action or attitude motivated by curiosity, often with a slightly negative or frivolous connotation.
A yojijukugo combining 興味 (interest, curiosity) and 本位 (standard, basis), literally 'curiosity-based'. The exact historical derivation is uncertain.