**The resignation of former mayor Takeharu Yamanaka following a confirmed power-harassment investigation has shaped the October 18 special election, prompting candidates to emphasize governance, compliance, and administrative stability.** Atsumi Harasawa leads trader pricing after securing LDP Yokohama chapter and National Democratic Party recommendations plus economic-sector support, positioning her as the candidate focused on restoring staff morale and advancing stalled municipal functions. Kazuma Nakatani, backed by the Constitutional Democratic Party, Atsushi Fukuyama with Sanseito endorsement, and Yuka Asaka as the Japanese Communist Party candidate add to a fragmented field. Policy differences on local development, disaster preparedness, and child-rearing measures, along with the short official campaign window beginning October 4, remain key variables that could shift the current closely matched probabilities ahead of voting.