A 70-year-old Japanese woman accused of killing three partners and attempting to murder a fourth has told a court that she fatally poisoned her husband, Sky News reported.

Chisako Kakehi was arrested in 2014 and went on trial in Kyoto late last month.

Her lawyers have pleaded not guilty on her behalf, and when her trial began she said only that she would "leave everything" to her defence team.
But in court, asked if she killed her husband, she said there was "no mistake."

The woman said she committed the crime because her husband was not treating her well financially, and that she obtained the cyanide from a business associate.

Prosecutors say Ms Kakehi targeted the men for their money and poisoned them all with cyanide.