I've been using FAD Pandora VI for a while & would recommend it. It's magical with Jpop/Anime (I guess because FAD is made in Japan) since it's more of a bright (Mid/High) centric headphone. I'm an anime lover myself and I have tons of OSTs with FLAC files. Impressive soundstage and a very musical headphone.
My only complaint about FAD Pandora is that its bass; It can go very deep (as deep as planar headphones can do) but the bass slam needs improvement. Pair it with a neutral amp and you'll get bored after a while, so it needs a warm amp (thankfully I own the iFi micro BL so it helps a lot).
I was basically in the same boat as you, trying to figure out what cans would be labelled as 'Weeb'.
If you could, I strongly recommend you try ZMF Eikon or Atticus. It's not an open headphone, but they're one of the best TOTL Closed headphones you can find.
I found that ZMF Atticus is the more fun sounding with that visceral bass slam I've been looking for. But if you want to hear more details with juiciest sub-bass you can find, give a go with ZMF Eikon. Both of these cans have impressive soundstage for a closed can too.
Z1R is okay too but I find them inferior to the ZMFs in many aspect except for comfort. You need to pair with a proper neutral Amp (screw people who said they are not amp dependent) that can tighten their bass or you'll end up disappointed. Airy soundstage, impressive bass quantity & sub bass but weaker bass slam than the ZMFs. Also, I find the treble a bit sensitive to my ears even though people say it's smooth. But ultimately, I ended up disappointed with Z1R because it's bloody over-priced for its performances & it didn't pair well with my iFi BL (warm amps will exacerbate it's boomy bass and slightly veiled mids). You really need to use a balanced cable & amp to bring the best out of it, which I find it hard to accept because ZMFs headphone already sounded good without those upgrades. It's an expensive route for sure, just to get that 'good sound'.
If you opt for open headphones, you could try Focal Elear and Focal Clear. I'm not a huge fan of open headphones despite the soundstage & air because of the bass; they can go deep & punchy but you'll end up missing the slam.
Just my 2 cents.