After a few years getting to know the Gulch neighborhood, Sarah Gavigan thinks she knows what the people want: Otaku, and lots of it.
That's the name of Gavigan's 3-year-old Gulch restaurant, Otaku Ramen, housed at 1104 Division St. Over the next week and a half, Gavigan and her team are transforming a restaurant space just a block or so over, at 505 12th Ave. S., into Bar Otaku: A Japanese Izakaya. The new concept, set to open Jan. 12, is replacing Little Octopus, another Gavigan restaurant that…