(Updated 2/10/2018): Masu does not state the type of broth in their pork belly ramen, but the flavor resembles that of a shoyu based broth. For $1 more you can make the broth spicy which does have some kick to it but does not alter much of the shoyu flavor (although the spice level is not always consistent). Masu has always done their pork belly right which is slow roasted with generous slices, but more recently has seen a dip in quality. In our opinion, the poached egg sets their ramen apart from others! Get it during happy hour (or late night) for only $12.50 ($2 off the regular menu)!