On an island surrounded by the sea in the 23 wards, Umi no Mori Park, which is rich in nature and offers a vast view, will have its grand opening on Friday, March 28, 2025.
This park has been developed as a project to revive the waste landfill site of Tokyo Port into a beautiful forest, based on the concepts of “resource circulation” and “collaboration with Tokyo residents.” In addition to using branches and leaves from parks and street trees in Tokyo to create soil, elementary school students and volunteers grew the seedlings needed for the forest from acorns, and approximately 240,000 trees were planted in collaboration with 23,000 Tokyo residents, many companies, and NPOs. The seedlings were carefully raised by volunteers and others, and now form a beautiful forest.
Please look forward to the grand opening of Umi no Mori Park.

1. About the Grand Opening of Umi no Mori Park

(1) Date

Friday, March 28, 2025

*We will hold an event to celebrate the grand opening and experience the charm of the vast, nature-rich Umi no Mori Park for three days from Friday, March 28 to Sunday, March 30, 2025. Details will be announced in late January 2025.

(2) Overview of the Park

Location

Umi no Mori 3-chome, Koto-ku, Tokyo

Area

Approximately 60 hectares

Opening hours

9:00 to 17:00

Major facilities

Gathering Grassland, Fureai Forest, Higashi no Koyama and Nishi no Koyama Waiwai Hiroba (playground equipment and barbecue area), Visitor Center, etc.

*See attached press reference material (PDF: 1,488KB)

2. Decision of Umi no Mori Park mascot character

In order to widely disseminate the park’s appeal, the city publicly solicited designs for a mascot character that would become the park’s face. From July to August of this year, an online popularity vote was held for 15 designs selected from 1,666 submissions, and 3,353 people voted.

The Grand Prize and Excellence Prize winners have now been decided after selection by the Umi no Mori Park Mascot Character Selection Committee.

The Grand Prize winner, “Umino Morisuke,” will be active as a mascot character at park events and on social media.

(1) Grand Prize Winner and Winning Works

Grand Prize

Yuki Tanikake

Name: “Umino Morisuke”

“Umino Morisuke” is a mythical creature discovered in Umi no Mori Park.

His special skills are tree climbing, playing in the water, and picking up trash. He loves kids. Come play with us!

(2) Winners of the Excellence Award

Excellence Award

Hajime Tsunashima, Mari Toyomura

“Umi no Mori Park Mascot Character Selection Committee” (Titles omitted, in no particular order)

tupera tupera (Picture book author, creative unit)

Kisei Murayama (Actor, Tokyo Children’s Ambassador)

Toshi Hirahara (Assistant Professor (Natural Environment Conservation), Tokyo University of Agriculture and Technology)

Eijiro Hayashi (Representative of Umi no Mori Park Volunteers)

Ken Wakabayashi (Director, Waterfront Development Department, Port and Harbor Bureau, Tokyo Metropolitan Government)

This project is related to the “Future Tokyo” Strategy.
“Strategy 13: A Tokyo Strategy with Water and Greenery”

Contact
Marine Park Division, Waterfront Development Department, Port and Harbor Bureau
Tel: 03-5320-5578