Translation

半可通 / 道楽半分の愛好家 / 素人かじりの人

Meaning

A dilettante is someone who takes up an art, subject, or field in a shallow or casual way rather than with serious study. It often sounds critical, even though it can suggest cultured interest.

Examples

• 彼は美術について語るのは好きでしたが、批評家たちは彼を半可通と見ていました。
  He loved talking about art, but critics saw him as a dilettante.
• その本は、歴史に少し手を出しただけの素人が書いたように感じられました。
  The book felt like the work of a historical dilettante.