According to Sponichi News, animator Araki Shingo passed away on December 1st due to acute heart failure. He was 72 years old. Araki entered Mushi Production in 1964 and established Gekiga art style in Kyojin no Hoshi and Ashita no Joe.

Araki's major works
Ashita no Joe (Graphic director)
Rose of Versailles (Character design and graphic director)
Cutey Honey (Character design and graphic director)
Majokko Megu-chan (Character design and graphic director)
Saint Seiya (Character design and graphic director)
Kindaichi Shounen no Jikenbo (Character design)
Yu-Gi-Oh! (Character Design)
Yu-Gi-Oh! Duel Monsters (Character Design)

Source: Sponichi Annex