Politics

Odaiba Local Referendum Ordinance Sets New Signature Thresholds for Ballot Measures

Odaiba residents seeking to place development questions on the ballot must now gather signatures from 8 percent of registered voters in the zone, a higher bar than the 6 percent applied in Minato Ward under the same Tokyo rules.

By Odaiba Policy Desk · Published July 8, 2026

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Odaiba Local Referendum Ordinance Sets New Signature Thresholds for Ballot Measures — Photo by ajari / flickr (by)

The Tokyo Metropolitan Government enacted the Local Referendum Ordinance on 1 July 2026, which applies to Odaiba and requires petitioners to collect signatures from 8 percent of registered voters within the special zone before a ballot measure on waterfront projects can proceed to a public vote.

Population growth and new commercial sites along the waterfront prompted the ordinance update. Odaiba recorded 18,400 residents in the 2025 census, and the area added three large office towers and an expanded convention centre in the past 18 months.

Comparison to other Tokyo wards

Under the same ordinance, Minato Ward requires only 6 percent of registered voters for petitions on similar development questions, while Chuo Ward sets the threshold at 7 percent. The higher Odaiba figure stems from the zone’s designation as a special development area with separate administrative oversight.

Local residents report that the change affects questions about ferry terminal expansions and noise limits from outdoor events at Odaiba Kaihin Park. A petition on extending the Yurikamome line to new residential blocks would now need roughly 1,470 signatures instead of the 1,100 that would suffice under Minato Ward rules.

Budget and next steps

The 2026 Tokyo Metropolitan Budget allocates 120 million yen for referendum administration and signature verification across all special zones, including Odaiba. The government projects that the first ballot measure under the new thresholds could appear on the ballot in the October 2027 local elections if petitions are filed by the March deadline.

Verification of signatures will be handled by the Odaiba zone office, which will publish weekly counts once a petition begins circulation. Residents can review the full ordinance text on the Tokyo Metropolitan Government website.

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