Prime Minister Shinzo Abe of Japan, who is also the Liberal Democratic Party leader, and Yuriko Koike, the Tokyo governor who also heads the Party of Hope, shake hands before a debate on Oct. 8.Credit...Kim Kyung-Hoon/Reuters TOKYO — Last month, when Prime Minister Shinzo Abe of Japan dissolved Parliament and called a snap election for Oct. 22, he seemed to be making the decision from a position o