Unlike the katas in most Karate styles, which are performed solo, Judo's katas are all performed with a partner. (More than that, depending on the level of Black Belt you are shooting for, you need to show kata proficiency as either tori, uke, or both!). While I might get flamed for saying so, Kata in a sense is like a dance - each partner has a role, and each partner needs to learn it.
For Shodan (1st degree BB. AFAIK, in the US) you need to perform Nage-No-Kata as Tori. Interestingly enough, performing it as Uke is required for Nidan (2nd degree), and now that I am familiar with it, I understand why that was done!