Not to usurp any amplification that Peter might give, and hoping he has more. It probably doesn't have anything to do with politics - looks like Ueshiba's son-in-law blew the whistle on him.
Nakakura Kiyoshi, AIKI NEWS #79
Iwata Ikkusai recalled the first part of the incident as well, hearing yelling and seeing Takeda, dressed in high clogs and a cape, slapping a nikyo on the taxi driver.
There was also an incident in Aiki News where someone said that Takeda showed up, but it wasn't until later that this person realized he hadn't paid the taxi driver. Was that a separate incident?