The widow of a Financial Ministry official, who killed himself over document tampering related to favoritism allegations against then Prime Minister Shinzo Abe, said Thursday she has asked Japan's new leader Fumio Kishida to reinvestigate the case.

Masako Akagi, 50, in a letter sent to Kishida the previous day called for a fresh third-party probe to reveal the truth behind the 2018 death of her husband Toshio, who was allegedly ordered to alter ministry documents in connection with the heavily discounted sale of state-owned land to a private school operator.

Kishida has so far remained reluctant to order a reinvestigation into the document tampering scandal related to the dubious land transaction with Moritomo Gakuen, the school operator in Osaka with ties to Abe's wife Akie.