Masumi Hayashi, facing the death sentence for murdering four people with poisoned curry in 1998 in Wakayama, said Tuesday she had conspired with her husband to poison him with arsenic to collect insurance money.
At the hearing at the Osaka High Court, Hayashi, 42, said her 59-year-old husband intentionally drank the poison to obtain the payout.
She quoted her husband as saying, "I will earn hundreds of millions of yen using my body."
The former insurance saleswoman broke more than five years of silence at the appeal hearing in June to deny the murder charge.
The Wakayama District Court sentenced her to death in December 2002 for killing four people and making 63 others ill lacing a curry strew with arsenic on July 25, 1998.
The lower court concluded that the arsenic found in the curry pot was identical to arsenic powder found in Hayashi's home and other places where she had been.