How to say "unusually" in Japanese

• いつになくCommon
  adverbCovers the true sense of 'unusually, uncharacteristically': behaving or appearing unlike one's usual self, as in being unusually quiet today. The nuance is a temporary departure from the norm, not degree.
  ウーッ、今日きょうの練習れんしゅうはいつになくハードで辛つらい。↗

  Whoo! Today's practice is tough - much harder than usual.
• 殊にことにJLPT N1approx.Common
  adverbPrimarily means 'especially, particularly, above all'; 'unusually' is a secondary shade. It marks something as standing out among others, so it seldom expresses personal uncharacteristic behavior.
• 人一倍ひといちばいCommon
  adverb, no-adjectiveMeans '(much) more than others, exceedingly'; 'unusually' is incidental. Use it for someone notably more diligent, sensitive, and so on than people in general, not for a departure from one's own norm.
  レギュラーになるなら、人一倍ひといちばい頑張がんばらなくっちゃ。↗

  If I'm to become a regular, I have to work twice as hard as the rest.
• 特段とくだんCommon
  adverbChiefly 'especially, exceptionally', often in the sense of 'nothing in particular, nothing special' in negative contexts. As 'unusually' it is marginal; it rarely describes uncharacteristic behavior.

Use 「いつになく」 for someone or something being uncharacteristically different from usual; the other three are mainly intensifiers — 「殊に」 and 特段 'especially', 人一倍 'more than others' — where 'unusually' is only a secondary nuance.

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

• いつになくunusually
• 殊にことにespecially
• 人一倍ひといちばい(much) more than others
• 一方ならずひとかたならずunusually
• 常ならずつねならずunusually
• 例年になくれいねんになくunusually (compared to a typical year)
• 斜めならずななめならずunusually
• 例に無くれいになくcontrary to one's habit
• その割にはそのわりにはunexpectedly
• 馬鹿にばかにridiculously
• ことのほかexceedingly
• 特段とくだんespecially
• たまさかrarely
• ばかincredibly