A former student at Melbourne's embattled Yarra Valley Grammar has revealed she was sexually assaulted by a teenage boy while on a school camp.

The woman said the recent news of boys at the school caught with a list ranking female classmates from "wifeys" to "unrapable" has triggered her trauma.

The woman, who has shared her story exclusively with 9News, cannot be identified for legal reasons.

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The woman said she was 15 when was allegedly set upon in a sleeping bag while on school camp on the Warrandyte River about 12 years ago.

"I was crying, I asked him to stop, I was moving into different positions to try and get him to stop but I didn't want to wake anyone," she said.

She said she left school after the alleged incident and suffered nightmares, depression and post-traumatic stress disorder.

It got so bad she had to wear cotton gloves to bed because she scratched herself in her sleep.

"I attempted to take my own life," she said. 

Her attacker, a teenage boy at the time, was found guilty of sexual assault in a children's court.

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Yarra Valley Grammar declined to comment on the matter. 

"The school is unable to comment on individual past students including the alleged historical matters you have raised from 2012," the school said in a statement to 9News.

"Any concerns regarding alleged student misconduct are investigated thoroughly and if proven are dealt with accordingly."

9News is aware of another complaint from a victim in a separate case.

Yarra Valley Grammar paid that former student compensation through the National Redress Scheme for victims of institutional child sexual abuse.

That victim received an apologetic letter.

"I recognise how the abuse you suffered has changed your life and has left you with difficulties to this day. I apologise for the impact the abuse has had on you," the letter read.

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The allegations came in the wake of a ranking list scandal, in which year 11 students shared a spreadsheet including photos of female peers to the instant messaging app Discord.

The girls were ranked from top to bottom as "wifeys", "cuties", "mid", "object", "get out" and then finally "unrapable".

Two male students have been consequently expelled. 

National Domestic Violence Service: 1800 RESPECT (1800 737 732). If you are in immediate danger call triple zero (000).

Readers seeking support can contact Lifeline on 13 11 14 or beyond blue on 1300 22 4636.

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The number of vacant houses in Japan has surged to a record high of nine million – more than the entire populations of Sydney, Brisbane and Adelaide combined – as the east Asian country continues to struggle with its ever-declining population.

Abandoned houses are known in Japan as "akiya" – a term that usually refers to derelict residential homes tucked away in rural areas.

But more akiya are being seen in major cities, such as Tokyo and Kyoto, and that's a problem for a government that's already grappling with an aging population and an alarming fall in the number of children born each year.

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"This is a symptom of Japan's population decline," Jeffrey Hall, a lecturer at Kanda University of International Studies in Chiba, said.

"It's not really a problem of building too many houses" but "a problem of not having enough people," he said.

According to figures compiled by the Ministry of Internal Affairs and Communications, 14 per cent of all residential properties in Japan are vacant.

The numbers include second homes and those left empty for other reasons, including properties temporarily vacated while their owners work overseas.

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They aren't all left to ruin, like traditional akiya, whose growing number present a range of other problems for the government and communities, experts told CNN.

They include stifling attempts to rejuvenate decaying towns, becoming potential hazards due to the lack of maintenance, and raising the risks for rescuers in times of disaster in a country prone to earthquakes and tsunamis.

The problem of too many homes

Akiya are often passed down through generations.

But with Japan's plummeting fertility rate, many are left with no heir to pass to, or are inherited by younger generations who have moved to the cities and see little value in returning to rural areas.

Some houses are also left in administrative limbo because local authorities don't know who the owners are due to poor record-keeping, they said.

That makes it difficult for the government to rejuvenate fast-aging rural communities, hampering efforts to attract younger people interested in an alternative lifestyle or investors eyeing a bargain.

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Under Japan's tax policies, some owners often find it cheaper to retain the home than to demolish it for redevelopment.

And even if owners want to sell, they may have trouble finding buyers, said Hall, from Kanda University.

"Many of these houses are cut off from access to public transport, health care and even convenience stores," he said.

Too few people

Trending videos showing people – mainly foreigners – scooping up cheap Japanese houses and turning them into stylish guesthouses and cafes have garnered many followers on social media in recent years, but Hall warned it's not as easy as it seems.

"The truth is most of these homes are not going to be sold to foreigners, or that the amount of administrative work and the rules behind it (are) not something easy for somebody who doesn't speak Japanese and read Japanese very well," he said.

"They're not going to be able to get these houses for cheap."

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Japan's population has been in decline for several years – at the last count in 2022, the population had shrunk by more than 800,000 since the previous year, to 125.4 million.

In 2023, the number of new births fell for the eighth consecutive year, reaching a record low, according to official data.

Japan's birth rate has hovered around 1.3 for years, far from the 2.1 needed to maintain a stable population, and just last week Japan's Ministry of Internal Affairs and Communications said the number of children under age 15 had dropped for the 43rd straight year to a record low of around 14 million, as of April 1.

So, all that means the problem of too many homes and too few people looks set to continue for some time.

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