Complex sentence: The Prime Minister of Japan, Kamiya, is also a member of the club and an extreme glutton and secretly plans with his cabinet members to take control of the club and Kagura for themselves.
Split into simpler sentences: The Prime Minister of Japan, Kamiya, is also a member of the club and has an extreme desire of gluttony. He secretly plans with his cabinet members to take control of the club and Kagura for themselves.