How many moves are there in judo? 

There are 100 judo techniques that make up the Kodokan List of Judo Techniques, 68 of those are Nage-waza (judo throws) and 32 are Katame-waza (groundwork).

In 1920 the Kodokan revised the Gokyo No Waza to include 40 principle throwing waza. You can find a complete guide and list of ‘moves’ via the Kodokan Judo Institute website: http://kodokanjudoinstitute.org/en/waza/list/