"I had a dream that told me I would become attractive to women if I recited a particular incantation," it quoted the man as saying.
A rapid series of weddings and divorces left the man with a large group of ex-wives, mostly in their 20s and 30s, who shared his surname and continued to live with him.
It turns that his magic incantation didn't work or wasn't magic. Instead he used fear and hypnosis to keep his harem.
Police found a stun gun and tear gas Friday at the Tokyo home of a man who said he persuaded 11 younger women to live with him by chanting a spell, media reports said.
Police suspect he used the weapons to prevent the women, mainly in their 20s, from leaving, the reports said.
Police confiscated several books on hypnosis from his home, Kyodo said.