Yamagami said he harboured hatred for this religious group because his mother had been coerced into joining it and was sucked into paying exorbitant membership dues and donations that bankrupted and broke up the family.
https://www.learnreligions.com/aum-shinrikyo-japanese-doomsday-cult-4171578
Japan is not exempt from cults.
The lady across the street has had problems with her elderly mother getting sucked into donating heavily and participating with some Asian temple, here in CA. Her mother got angry and defensive when the daughter tried to intervene and stop this. This was probably a year ago. No idea what the current status is.