Anyone remember a monster movie a few years back?

It was about a reptilian monster that lived in the sewers or storm drains of a large city. It preyed on the poor communities and markets that were adjacent to those areas. The "hero" looked Japanese, and went into the sewers to find his sister or daughter who had been taken by the monster.

I don't remember any big names being attached to the cast or crew. The trailers didn't indicate much in the way of effects, big guns, etc. Just desperate people in terrible circumstances.