Ramen Ichinen is probably closest to authentic that I've had in Calgary.
https://goo.gl/maps/eNUMRw5tgoLvhHRH9
Y93 has a decent tonkotsu that isn't too salty, but still tons of flavor.
https://g.page/y93SushiCrave?share
I've been creating a map of Japanese restaurants, just thought I'd post that as well. Still working through and adding ones I'm missing, and updating closed ones.
https://www.google.com/maps/d/edit?m...ej&usp=sharing