To mark what is being regarded in Japanese is について (nitsuite), and in Korean, 에, but do these two concepts completely overlap?
돼지고기에 질렸어요.
I got tired of pork
Would a translation into Japanese use について? I ask because 에 seems like a 'weak' relationship marker, whereas 에 관하여 seems 'strong.' Is there a difference in Japanese?
No, Japanese would not use について because the verb to be used would be あきる, see also here. The reason is that あきる requires the object to be marked with the case particle -ni:
私は豚肉に飽きた。
watashi-wa butaniku-ni aki-ta.
'I grew tired of pork.'
The expression について is often better translated as about:
私は言語学についての本を読んだ。
watashi-wa gengo-gaku-ni tsuite-no hon-o yon-da.
'I read a book about linguistics.'
The meaning regarding can also be expressed by に関して and に対して.
