How to say "increasing" in Japanese

• 上乗せうわのせCommon
  noun, suru verb, transitive verbCovers 'increasing' only in the sense of adding an extra amount on top of what is already there, especially tacking on a charge; it does not express general growth in size or number.
• 増長ぞうちょうCommon
  noun, suru verb, intransitive verbThis is seldom the word you want for a neutral rise in quantity or amount; it really describes something undesirable becoming more severe or growing worse.

Use 「上乗せ」 when 'increasing' means adding an extra amount on top of an existing one, especially tacking on a charge; 増長 is not for neutral increases in quantity — it describes something becoming more severe or growing worse.

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

• 上乗せうわのせadding (an extra amount)
• 右肩上がりみぎかたあがりgrowing (graph rising to the right)
• 増長ぞうちょうbecoming more severe
• 嵩上げかさあげincreasing (a budget, fees, etc.)