^^ I am waiting for info on post soak shrinkage as well, Cucoo, before I soak my pair. My size 36" raw knee measures 9.5" - 9.6", 14" down from the crotch and the leg opening is 8.25" - 8.5". I think they are a tight straight fit. I expect the size 30 leg opening will be less than mine raw so it is likely post soak size 30 will be less than 8". Naoki at pants-shop-avenue.com is also a good source but the last time I asked him for shrinkage info he gave me the party line/Rakuten estimates. As I re-read my post, I see there is no definitive info other than my raw measurements which will at least give you an idea of taper/no taper. I have not yet soaked mine because if real life post soak info on shrinkage shows too much loss in the leg, I'll put them up for sale (sadly). If I see post soak measurements for any size, I'll post them and expect you will too.
edit - I don't belong to another denim site but there may be actual shrinkage dimensions elsewhere. Does anyone have suggestions as to another denim site to view?