impressions after reading; thoughts on a book
Refers to one's personal reflections, feelings, or opinions formed after finishing a book or other reading material. Often used in contexts like book reviews or reading journals.
If I had to sum up my impression after reading this novel in one word, it would be 'refreshing'.
読後感をブログに書くのが趣味です。
My hobby is writing my thoughts on books I've read on my blog.