A baby-faced Japanese cosplayer accused of cutting off her boyfriend's ring finger to stop him marrying anyone else has been seized by police.

Horrified officers in Osaka found the severed finger in a jar preserved in alcohol in suspect Saki Sato's fridge after her partner called for help.

The boyfriend, who has not been named, says the pair argued when Sato told him he could never date anyone else.

So she grabbed a blade, local media reported on 10th May, and hacked off the third finger of his left hand.

Her boyfriend said in a social media statement: "I tried to break things off, but she said if she couldn't have me, no one could.

"She told me she loved me too much."

He added: "When she grabbed my hand, I thought it was just another tantrum, but then I felt the pain and saw the blood.

"I never thought she'd go this far. I still can’t believe it happened."

Sato has been charged with three counts of assault and was formally indicted on 21st April.

She denies any wrongdoing and claims her boyfriend cut off his own finger.

In a previous disturbing episode Sato's boyfriend told how she cut off part of one of his nipples as an experiment to see if it would grow back.

Sato's besotted boyfriend fell for her in 2023 when he was a 19-year-old schoolboy and moved in with her.

But he soon found that behind her cute, innocent looks she could be controlling and manipulative.

He claims she kept his cheque book and phone in her locked safe, making him beg for access to them.

Photos of her from social media platforms show her dressed in revealing, pink-furred bikinis and leggings supposedly based on her pet cat.

Others show her in what seems to be a kinky S&M milkmaid's outfit.

Sato also works as a model and DJ and appeared in photoshoots for trendy magazines like Numero TOKYO.

But the case has appalled Japanese social media users who have branded her a 'yandere', a anime term for a character that seems sweet but is really a jealous monster.

One said: "I thought this was just a fictional yandere trope, but is this girl an actual criminal suspect? Reality is stranger than fiction."

Another said: "I always thought 'love you to death' was just a poetic phrase, but turns out it is actually an action."

It is unclear if surgeons were able to sew the finger back on.