39333
> 弁護士の小倉秀夫は、 **掲示板上** で投稿が殺到することをフレーミング・炎上、 **ブログ上**
> でコメントが殺到することをコメントスクラムと2つに分類している

I wanted to know why 上 need to be used in these cases.

Couldn't it be just 掲示板 and ブログ?

And I also wanted to know if the reading is really じょう.

Thank you!
CC BY-SA 3.0
2016-09-20T00:57:30.127
39331
2016-09-20T01:26:24.913
17956
question
meaning readings suffixes
Why 上 is being used in these cases? How do I read it?
It's obvious that they stand for locative case instead of instrumental even
without 上{じょう} here. In that sense, it's not necessary. But 上 makes it clear
that it's locative. In addition, it tends to be used when the location is
virtual one like newspaper or internet, and you are not only a reader but a
speaker.
CC BY-SA 3.0
2016-09-20T01:26:24.913
39333
2016-09-20T01:26:24.913
4092
39331
answer