The 47-year-old mother of a 16-year-old girl who died of extreme weakness in 1999 has been arrested on suspicion of starving her to death, according to local police.

Tsuneko Naraoka, a post office worker in Hachioji in western Tokyo, was arrested Tuesday over the death of her daughter Masako. Naraoka has admitted to the allegations, police said.

According to investigators, Masako became bedridden after falling ill around September 1998. Naraoka neglected her, only giving her small portions of food and drink at their apartment in Hamura, western Tokyo.