The strange device. Source: Supplied

Takiko Shindo is known for something called “Oppai Taisou”, which roughly translates into English as boob exercise massage”.

Her latest advancement in the bustling field of bust enhancement is something called the “Oppai Taisou Hand,” that is basically a pink rake for stroking and brushing one’s breasts, according to Rocket News 24.

The rakish product sells online for between $41 and $54. A commercial suggests it can increase a woman’s bust by three centimetres.

The so-called “science,” according to Shindo, is that ligaments holding up breasts need to move. Otherwise fats in the same area settle down around the chest muscles, and causes breasts to sag, Rocket News 24 reports.

As titillating as it sounds, Shindo’s theory flies in the face of modern medicine, according to Dr. Barry Handler, a board-certified cosmetic surgeon in San Diego.

“There are ligaments in breast tissue that stretch over time,” he told HuffPost. “But once they stretch, they don’t snap back. Ligaments aren’t like muscles — there’s no contractible property.”

But Shindo’s mammary massage device may not be a complete bust, according to Dr. Bruce Lee, a Beverly Hills-based gynaecologist.

“Usage of the breast rake upon oneself actually does accomplish several things that theoretically could alter the perception of breast size and shape,” he said. “When holding the rake in the right hand and massaging and lifting the left breast, one is actually exercising the right pectoral muscles, which lie beneath the breast.”

Lee says these muscles, when exercised, will enlarge and tighten and add shape to the upper body. He also says mechanical breast stimulation can increase breast growth in both men and women.

“Certainly, the breast hand or rake is a novel stimulus for the manufacturer, who, no doubt, is smiling. And, pardon the pun, handily raking it in,” he said.

This article originally appeared on the Huffington Post and was republished with permission.