In terms of fit, I need something that is fairly generous around the thigh area. My Epaulet Rudy trousers are 13.25" thigh 12" rise approx. Then ideally fairly slim around the calf and ankle, but not hugging my leg. I imagine If I found something that fit up top but was a bit too loose for my tastes down bottom I could just taper it though?
Anyway I essentially know nothing about jeans and all the random jap brands that everyone talks about so I would greatly appreciate being pointed in the right direction.
I'd suggest looking at the MAX fit of Acne jeans. Good quality, with a fit that sounds like it matches what you're looking for. I much prefer the Snake fit, but that will be too tight for your purpose.
Stocked at Acne in Melbourne and Sydney and a plethora of places online.