[![enter image description
here](https://i.stack.imgur.com/odWB2.png)](https://i.stack.imgur.com/odWB2.png)

幽霊事件はその特異性上どうしても捜査が後手に回ってしまう

My understanding of the sentence is that she's saying that due to the 特異性
nature of the case in the end the investigation falls behind/stalls 後手に回ってしまう.

However I'm curios on how 上 by itself is acting here. I would assume it's
either 上に or 上で, however the particle is entirely omitted so I'm not sure.
CC BY-SA 4.0
2023-08-17T09:33:09.287
100689
2023-08-17T10:39:08.767
57295
question
particles particle-に sentence
What does 上 without a particle means?
When used as a suffix, it is read 上{じょう} an it turns the preceding word into a
のadjective or an adverb. Just as Xの上{うえ}で, it means "in terms of X"([see this
for reference](https://hedgehog-japanese.com/grammar/jlpt-n2/jou/)).

For example:

> 歴史 History -> 歴史上 "In terms of history", i.e. "Historical, Historic"

> 形式 Form, format, style -> 形式上 "In terms of format", i.e "Ceremonial"

> 特異性 singularity, peculiarity -> 特異性 "In terms of peculiarity".
CC BY-SA 4.0
2023-08-17T10:39:08.767
100690
2023-08-17T10:39:08.767
32952
100689
answer