Tokyo- Japan's Supreme Court on Tuesday upheld the death sentence of a woman convicted of killing four people and sickening dozens of others with arsenic in 1998.

Masumi Hayashi, 47, was convicted of murder for poisoning a curry stew served at a community festival in the western city of Wakayama in 1998. Four people died including a 10-year-old child and a 16-year-old girl, while 63 others still suffer from aftereffects of arsenic.