Tokyo announces Halloween event at Sea Forest Park in Koto Ward

The Tokyo Metropolitan Government has announced that an event called TOKYO 海の森 HALLOWEEN 2026 will be held at Tokyo Metropolitan Sea Forest Park (都立海の森公園), in the 海の森三丁目 district of Koto Ward, Tokyo. The announcement is published on the metropolitan government's own website as a press notice, under the heading that the event is to be held.

That is the whole of what the notice we have seen sets out. It names the event, names the park, and places the park in Koto Ward. It does not give dates, opening hours, ticket prices, whether entry is free, what the programme contains, or how visitors should travel there. Anyone hoping to plan a trip around it will need to wait for those details to be published separately.

One detail worth noting for readers: the park is described as 都立, meaning it is a metropolitan park run by the Tokyo Metropolitan Government rather than a ward or private facility. That is consistent with the announcement coming from the metropolitan government rather than from Koto Ward or an events promoter.

Our reading, and it is only a reading: this looks like the first, bare notice of an event, of the kind that precedes a fuller listing with practical information. We would not treat the absence of dates here as meaning the event has no fixed dates — simply that they are not in this notice.

For now, the useful takeaway is narrow but real. There is a Halloween event planned at a Tokyo metropolitan park in Koto Ward, announced by the metropolitan government itself. Readers who want to attend should watch the metropolitan government's press pages for the follow-up notice rather than rely on this one, which does not yet answer the practical questions.