The children, whose mothers came from impoverished backgrounds, had all been fathered by 20-something Mitsutoki Shigeta, son of Japanese billionaire Yasumitsu Shigeta. But not in the typical way sociopathic trust fund kids tend to put a baby in the help. Instead he had the women artificially inseminated with his sperm. Shigeta told the head of one fertility clinic that he hoped to eventually have over a thousand children, fabricating a steady 10-15 every year until his death of, we'll assume, over-masturbation.
He had already set up another "baby factory" in Thailand, having produced in total 16 offspring this way. His motive for this teething throng? Shigeta told the clinic head that he thought an army of children would help him win elections -- which his lawyers later revised to the only slightly less insane "He just wants a huge family."
"I figured I'd pop out a baseball team and see where things went from there."
When the clinic discovered his plan, they immediately called Interpol, afraid this ultra-rich insane person would burst into their sperm bank one day, like Mr. Freeze, but with a way more terrifying gun. He was forced to flee Thailand with the police hunting him on human trafficking charges, but his daddy's very expensive lawyers fought back. He was awarded full custody of 13 of his 16 known Thai kids in 2018.
Since then, Shigeta has allegedly relocated his baby-making operation to India and Ukraine, where the local governments are hopefully more understanding of his plan to put a Shigeta in every classroom.