Ex-pornstar Saki Sudo has been charged with murdering her 77-year-old husband.

The 25-year-old got married to her now deceased business tycoon husband Kosuke Nozaki in February 2018 in Japan.

Reportedly, Kosuke declared that he slept with 4000 women and demanded sex three times daily this earned him the nickname ‘don juan’.

 "I am sorry for the 99 per cent of people who wish for this marriage to fall apart, but I am confident that I will be happy." He wrote in his memoir. He also stated therein that he is convinced that the secret to staying young was sex and he would be okay if he died and went to heaven while having sex.

"Our time in the bedroom is also fun. I’m convinced that is the secret to staying young," he added.

"We have a quota of sex three times a day and I don’t need Viagra. I know having so much sex may cause my death, but if I can die having sex and go to heaven then I am good".

Sudo was arrested in Tokyo last month as her phone internet records showed several search for ‘stimulant drugs’ and poisons.

The deceased wrote a book in 2016 titled: ‘Don Juan of Wakayama’, he wrote: “The reason I make money is to date attractive women”.

He reportedly asked Sudo: “Would you like to be my last woman?”

 Allegedly, Sudo appointed herself president of her deceased husband’s company, rumour has it that she intended fleeing Japan after the funeral but could not due to Covid-19 restrictions.