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Advance Voting Hits 9.5% as Undecided Voters Shape Japan’s Upper House Race

Final polls show incumbents ahead in Iwate, Saitama; an opposition candidate pulling slightly ahead in Miyazaki; an NHK Party nominee gaining traction on social media

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Overview

  • Advance voting between July 4 and 13 reached 9.48% of registered voters with nearly 9.9 million ballots cast ahead of the July 20 election.
  • Surveys indicate almost 30% of voters remain undecided in key districts, keeping the final outcome unpredictable.
  • In Iwate’s single-seat contest, CDP incumbent Kiyotaka Yokosawa maintains a stable lead over LDP veteran Tatsuhiro Hirano with unified opposition backing.
  • Saitama’s four-seat district has DPJ’s Hiroto Kumagai and LDP’s Toshiharu Furukawa holding the top spots in a crowded field.
  • Miyazaki’s race shows DPJ’s Yamauchi edging out LDP’s Nagamine, and in Aichi an NHK Party candidate has drawn over 8 million mentions on X, highlighting social media’s role.