Sesame Oil vs Toasted Sesame Oil
I think the Kadoya brand you bought was toasted as well, it just didn't bother to mention it. Everything I've bought from Kadoya has been toasted. They are easy to tell apart. Non-toasted is about the same color as say safflower oil, toasted is rather dark brown. Toasted is used primarily for finishing dishes, as a final flavor. A little goes a long way. Non-toasted is a pretty marginalized product; you see it at health food stores some times. I can't think of any culinary reason to prefer it over the many other choices and it is quite expensive. Maybe some folks have particular health reasons for choosing it.