Who Was In The Most Factions?

Before I get into this video, I should address the groups or factions that weren’t counted and how that would affect the list if they were. The main groups I was able to find before Oedo Tai was created was Full Power Girls, Showa-gun, and Heisei-gun. I wasn’t able to find any info on Full power girls except that apparently Saki Kashima was in it. So if you would like to count that one, add one more to Saki Kashima when she comes up.
Next we have Showa-gun, which affects Koguma. So give her a plus one if you wish to count this. Last I have Heisei-gun, which affects Io Shirai, Mayu Iwatani, and Hazuki.
One thing I have to mention, is that there was a somewhat comedy group called Azumi’s army, but it was so chaotic, and not a single member was ever confirmed outside AZM and Kaori Yoneyama that I didn’t count it. If you would like to, add 1 to both AZM and Kaori Yoneyama when they appear.
In conclusion if I were to count everything I mentioned, the person that had been in the most factions would become Kaori Yoneyama, at 5 factions. Azumi’s Army, Stars, JAN, TCS, and Oedo Tai. Hazuki and Saki Kashima would jump up to 4, Koguma would go to 2, Io Shirai would go to 2, and Mayu Iwatani would jump to 2 as well.