Story By: Lee Bullen, Sub-Editor: Marija Stojkoska,  Agency: Newsflash

A 25-year-old woman accused of poisoning her OAP tycoon hubby who claimed to have bedded 4,000 women allegedly carried out a trial run on their family dog first.

Saki Sudo is accused of murdering her wealthy husband, 55 years her senior, in the city of Tanabe in the Japanese prefecture of Wakayama three years ago.

Japanese tycoon Kosuke Nozaki, 77, married the suspect in February 2018 and died a few months into wedlock in May, according to the news site Tokyo Reporter.

He reportedly amassed his wealth through real estate, agriculture, and money lending, and had a plush palatial home in Tanabe full of works of art.

Nozaki also boasted about bedding 4,000 women and in 2016 he penned the book ‘Don Juan of Wakayama: The Man Who Supported 4,000 Women with JPY 3 Billion (GBP 22.8 million)’.

He wrote: “The reason I make money is to date attractive women.”

As a result of his admission, Japanese media began referring to him as ‘Don Juan’.

When he popped the question to Sudo, he reportedly asked her: “Would you like to be my last woman?”

However, reports said he presented the suspect with divorce papers shortly before his death.

The police said that Sudo killed her 77-year-old husband by acute poisoning by administering drugs orally.

She found her elderly husband dead on the sofa on the night of 24th May 2018 at their home in Tanabe.

The police previously said that the victim had a large amount of chemical components from drugs described as “stimulants” in his system.

Sudo is suspected of being the only person in the house when he is believed to have taken the drugs.

She was arrested by the police at the end of April.

Police sources told the newspaper Mainichi Shimbun that the suspect has “remained silent” since her arrest, despite evidence mounting against her.

Drug traces were found on the floor of the victim’s home as well as inside a vacuum cleaner.

The suspect’s phone details also revealed that she was in contact with a drug dealer known to the police prior to her husband’s death.

Meanwhile, the couple’s pet dog died shortly before the victim and the police are looking into whether she may have tested the drugs on the pooch before giving them to her elderly husband.

She is also suspected of trying to sell one of her husband’s expensive paintings, according to the Japan Times.

The investigation is ongoing.