The snap Yokohama mayoral election on October 18 stems from former mayor Takeharu Yamanaka’s September resignation after a third-party report confirmed multiple instances of workplace harassment, turning the contest into a referendum on his return amid a crowded field of six declared candidates. Lawyer Atsumi Harasawa holds the strongest organized backing from LDP municipal and related prefectural groups, while Kazuma Nakatani draws Constitutional Democratic Party support and others represent smaller or independent bases, fragmenting the vote in a brief campaign window. This setup keeps implied probabilities tightly clustered, with no single contender exceeding 40 percent in trader consensus. Late endorsements, turnout patterns among key urban districts, or new revelations tied to the scandal could shift momentum before ballots close.