It does not get any gorier than this.

Just for fear of the unknown, this woman killed all four of her babies.

The woman, a Japanese, says she put four of her babies in concrete-filled buckets and kept them in her apartment for 20 years.

The 53-year-old woman, Mayumi Saito, told investigators after she was arrested on Tuesday that she had given birth to the infants between 1992 and 1997.

Saito handed herself in at an Osaka police station on Monday and confessed, saying she did not think her lack of money made it possible for her to look after the children.

In plain terms, Saito killed her quadruplets because she was poor.

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Detectives who searched her home found four concrete-filled buckets in a closet.

Scans indicate that each one contains what appears to be the remains of an infant.

Police are still interviewing the woman, who lives with her son, and trying to determine whether she killed the babies or whether they were stillborn.

"I did not think I could afford to raise them. I had no one to talk to," she told police, according to national broadcaster NHK.

It is still unclear why she turned herself in now, local media said – perhaps the ghost of the children haunted her.

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