A 3-year-old girl has died after mum left her to go see boyfriend.

The little girl staved to death after her mum abandoned her for eight days while she visited her boyfriend 700 miles away.

Saki Kakehashi’s daughter was found wearing a dirty nappy and surrounded by rubbish inside her mum’s apartment in Tokyo’s Ota Ward. A post-mortem exam revealed she died from severe dehydration and hunger.

Kakehashi, 24, is alleged to have confessed to detectives, telling them she didn’t expect her daughter Noa to die when she left her alone for more than a week in June.

The mum allegedly told detectives she thought “it would be all right” to leave the youngster alone in their flat in Tokyo while she visited her lover in the Kagoshima Prefecture in southern Japan.

It is alleged the mum called for help after returning home on June 13 and told an emergency line that her daughter wasn’t breathing. Noa was then taken to a hospital, where she was pronounced dead.

A post-mortem exam found the child had suffered thymic atrophy, which is typically seen in abused or neglected children, and her stomach was almost empty.

Kakehashi allegedly told police that Noa that been unwell for days, but she couldn’t afford to take her to a hospital for treatment.

However, she changed her story and admitted that she had left the girl alone for eight days while visiting her boyfriend on the other side of the country.

Noa was wearing a nappy that hadn’t been changed for days and she had rashes on her bottom while the mum’s flat was filled with rubbish.

An investigation into the girl’s education shows she has not been going to school as staff at Noa’s nursery said they had not seen the girl for more than a year.

Noa lived with her mum, who was divorced from the girl’s dad.