Apart from being super pale, what are the main aesthetic differences

78.9% reduction in soul content.

>>15982317
>what are the main aesthetic differences between modern idol beauty trends and those largely in the 80s, 70s?
Better hair. Their hair looks much better and cuter now.

>80s and 70s idols look much more "Japanese" to me, while modern idols look like they are more Korean/Chinese
No, they look "white", which the Koreans are also trying their hardest to do. They have similar ideas about what makes them more white looking.

Who the fuck is the one in the 80s? You could have chosen someone more relevant like Seiko Matsuda for that decade, given that her style was eventually copied by every idol as well as regular girl in Japan at the time.

I would say idols nowadays look very "seiso-kei." Clean cut and polished hair and still the light makeup. Makes them look extremely girl-next-door and approachable. Also like you mentioned, more paleness in groups.
I noticed the outfits are even more adhering to the Akiba/anime-esque style. While yeah, 80s and 90s idols had some costumey idol outfits I feel you would find modern idol outfits more in videogames and anime.

Well yes, Japanese people are a lot more pale or light-skinned in general compared to 30 years ago. That is true for most central-asians though, sadly.

However, don't forget camera settings, style, equipment quality, after effects etc...

It's no biggie making a girl look twice as pale from camera settings alone, which is the norm these days as it is popular.

It's the same with the music industry. In the 80's idols actually had to sing well, perform atleast decent and a lot of other perks would have been useful.

Today you can slap autotune on everyone. It sound awful and is sad..
Once again, the 80's score a point.

>>15982317
80s and 90s look more Jomon.
The rest have the "Yayoi look".
Nineties is definitely the cutest.
I know nothing about idols.

no difference
what changed is how to make up

>>15982317
it depends upon how much exposure to overseas trends were going on at the times, and how readily they could be utilized by those in fashion circles. Access to satellite and/or cable being much more common from the mid 1980s on shortened any lead or lag times countries had in terms of adaption and appropriate appropriation of trends/looks.