So-called "old-school" judo taught strikes (atemi) that are much less sophisticated than karate. In fact, the popular key chain accessory (Kubotan) is based on the so-called "Judo-stick" or Yawara. The Yawara could be used in offensive as well as defensive techniques & nerve/pressure point strikes/techniques.
The strikes gradually de-evolved due to the competitive nature of Judo vis-a-vis Olympics. Japanese Ju-jutsu kept the strikes & low-line kicks. You'll look long & hard to find a Judo dojo that uses atemi in anything other than kata.