You might be intimidated buying gifts for your favourite knifenerd, but we'll let you in on a little secret: we're all a bunch of knifenerds, we know exactly what they want! The first rule of being a knifenerd is "You can always have one more knife" so don't be afraid to get them a knife. Go for something super flashy and sexy like a blade from Masashi-san or Fujiwara-san, or go for something really specialized like a Honesuki or Yanagiba.
Every knifenerd needs to sharpen their knives, so a starter set of sharpening stones makes a wicked gift. Another option is an often neglecteg part of owning a knife, having a good quality cutting board like a Larchwood board. If all else fails, a copy of The Knifenerd Guide to Japanese Knives is a very safe bet.