How to say "informative" in Japanese

• 情報量の多いじょうほうりょうのおおい
  i-adjectiveA less common way to say 'informative' in the literal sense of containing much information. The の form is attributive, modifying a noun directly, as when describing a fact-packed book or article.
• 情報量が多いじょうほうりょうがおおい
  expression, i-adjectiveA less common way to say 'informative' as 'having high information content'. The が form is the predicative one, used to state that a book, talk, or website contains a lot of information.
  インターネットは情報量じょうほうりょうが多おおいので、使つかえない情報じょうほうも沢山たくさんあります。↗

  The Internet has a lot of information and thus also a lot of useless information.
• 勉強になるべんきょうになる
  expression, prenominal modifierCovers 'informative' in the experiential sense — enlightening, illuminating, educational — for something you personally learned from. Though less common, it fits remarks on a lecture, article, or explanation that taught you a great deal.

All three are less common renderings of 'informative': 「情報量の多い」 and 「情報量が多い」 describe something packed with information (の before a noun, が as a predicate), while 「勉強になる」 covers the sense of something having taught you.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 情報量の多いじょうほうりょうのおおいinformative
• 情報量が多いじょうほうりょうがおおいhaving high information content
• 勉強になるべんきょうになるenlightening