I studied daito under three different teachers, None for more than two years at a stay. What I say in the following could be quite wrong. It comes from the accumilative memory of these experiences.
Ikajo, Nikajo, Sankajo, Yonkajo, Gokajo all refer to techniques originally designed to defeat grabs against one's jo staff.
If that's what you got from your Daito Ryu teachers, you should get your money back. That's totally wrong. What Ron said. Which lines did you study?