Cyanide found at home of Chisako Kakehi, aka Japan's "Black Widow," report says Did she kill six? ... Chisako Kakehi, centre, has been arrested and is suspected of poisoned her husband late last year, one of about half a dozen former husbands or partners of the woman who have died. CYANIDE has reportedly been found in the home of a woman suspected of poisoning her latest husband, after at least six other partners also died. Chisako Kakehi, 67, was arrested in Kyoto on Thursday after cyanide was found in the body of her 75-year-old husband, a senior official at the investigative department said. He spoke on condition of anonymity, citing the pending investigation. Ms Kakehi has denied involvement in the deaths and has not been formally charged. Her latest marriage lasted one month before her husband died in December. Questions to answer ... Chisako Kakehi is surrounded by reporters in Sakai, western Japan. Cyanide had also been found in the blood of a 71-year-old partner who fell while riding a bike in 2012, officials said. His death was initially attributed to a heart disease. Ms Kakehi had reportedly married three times and had relationships with three other men over the past two decades. All had died within a few years of marrying or starting relationships with her. All the deaths occurred in the western Japan area, including Kyoto and Osaka. Arrested ... Chisako Kakehi in Osaka, western Japan. Overnight, police raided her apartment in Osaka following searches at her home in Muko city, and confiscated capsules and wafers to wrap powdered medicine as possible evidence, reports said. Police also found cyanide hidden inside a rubbish bag at the home, according to Channel News Asia. Ms Kakehi caught the attention of authorities after she called an ambulance to rush her latest husband to a hospital, saying he suddenly collapsed at home. An autopsy found cyanide in his blood, and investigators eventually ruled out a suicide, leading to Ms Kakehi's arrest. She was being questioned by the prefectural prosecutor before a decision is made whether to press charges. Police said they suspect insurance claims or inheritance money could be the motive for the latest killing.