There are other denominations, but they say “in Buddhism.”
“Buddhism denies the soul” was probably written in some book, but in fact, this kind of common explanation is pretty rough.
Strictly speaking, Buddhism “denies Atman.” Well, when it comes to what Atman is, it's a concept that doesn't exist in Japan or China, so it's terribly difficult to explain. If I were to pull it from Wikipedia,
> The original meaning was “breathing,” but moving from there, it means life, self, body, the essence of the self, the essence of the self, the essential nature of things in general, and the eternal subject of independence that controls and unifies individuals inherent in the root of everything.
Yes, but it's different from the soul-like soul that Oriental people envision. However, since I can't give difficult explanations in order to write a book for the general public, I ended up with the words “denying spirits” while understanding that there is a misnomer.
There is also a translation of true self, but when you use it, you have to write an explanation of true self...
So, there is a structure where people who want to beat Japanese Buddhism take advantage of such circumstances and hit “Buddha denied spirits, yet Japanese Buddhism Gah, Japanese Buddhism Gah.”
Even in Japanese history textbooks, that was a lie, and this is also a lie, but please be aware that the same thing is actually happening in Buddhist textbooks without anyone knowing.
Now, when it comes to what “one spirit” is in Buddhism, I would be very grateful if you could think of it as an “idiom representing the deceased.”
If that doesn't convince you, take a look here. It's Link's Six Realms or “Seen Yourself.”
https://hasunoha.jp/questions/17875
Or is it easier to understand to write “the influence of the deceased”? Every action has “effects that appear immediately,” “effects that appear in the near future,” and “effects that appear in the distant future.” The effects of actions during life also exist after death.
It is true that this Buddhist worldview plays an important role in the Buddhist system of salvation. If you hold down such places and listen to the puja, the way you hear will change.
However, whether to call it a spirit or call Atman a spirit is a matter of definition of the word. It's only the meaning ① and meaning ② of the dictionary, so in the end, it's a sensitive issue of context and communication. So after all, I think it's safe to just think of it as an idiom.