On

[Kazuo]

Hello!

Memories crowded in on me.

I can imagine what the sentence is trying to say. But what does the “on” mean?

Thanks in advance

[stanislaw.masny]

Ohayo Kazuo
I've an unclear premonition that your sentence is quite right.
It would be a little bit strange as the following:
Memories + crowded in + in me.
I've heard the song named: "Lay All Your Love On Me" by ABBA.
Domo arigato, oyasumi.

[Kazuo]

Dzień dobry, Stanislaw.Masny

I’m surprised because you are very good at Japanese.

By the way, why “in me”?

“On me” is superficial, “in me” means a great deal of substance in it?

Naprawde przepraszam, Miłego dnia

[Tdol]

It sounds as if the person was overwhelmed/suffocated (metaphorically) or hemmed in by the memories.

[bds51]

Hello Kazuo,
The sentence is correct as is. "crowd in' is a phrasal verb meaning to move into a small space (in your example, the head or the brain or the mind) and we often use it with 'on' and it is often associated with memories or thoughts.