Holding "Week to End the Too Hot Summer"

<Intensive Communication Period to Transform Climate Change from a "Distant Problem" to a "Personal Issue">

The summer of 2025 recorded the highest average temperature since records began, with emergency transports due to heatstroke exceeding 100,000. With the establishment of "Extreme Heat Days" in 2026, rising temperatures are having a serious impact on our lives year by year.

Meanwhile, even as the scientific link between rising temperatures and climate change becomes clearer, the connection between daily experiences of heat and climate change has not yet been fully established as a societal understanding. Therefore, we are holding the "Week to End the Too Hot Summer" as a platform for intensive communication during this period when we feel the heat most acutely.

Three Key Points of This Announcement:

1. Flagship Event (August 7)

Key figures will gather at Shibuya Solasta.

Numerous new findings will be announced, including the "Weather Forecast for 2050 (Ver. 2)" which vividly depicts the future of climate change.

2. Intensive Communication of Diverse Voices During the Hot Season

Stakeholders affected by climate change, such as those in agriculture, sports, and business, will intensively communicate their personal connection to climate change during the period.

3. Installation of a Symbol Board

A symbol board for the campaign will be installed at an undisclosed location in Tokyo (details to be announced later). The "Untouchable High Temperature Index" will also be displayed to communicate the relationship between temperature and global warming.

"Week to End the Too Hot Summer" Overview

Name

Week to End the Too Hot Summer

Period

August 1, 2026 (Sat) - August 9, 2026 (Sun), a total of 9 days

Organizer

JAPAN 8・8 PROJECT Executive Committee

(Lead Organizer: Japan Climate Leaders' Partnership)

Official Website

https://www.japan88.jp/

Main Programs *Details to be announced on July 21

1. [Flagship Event] "Day to End the Too Hot Summer"

Date and Time: August 7, 2026 (Fri)

Venue: 10:30-12:30 SHIBUYA SAKURA STAGE (BLOOM GATE) On-site + Web streaming (both open to the public)

13:00-17:45 Shibuya Solasta Conference 4F On-site for 200 people (invitation only) + Web streaming (open to the public)

Speakers: Numerous individuals including scientists, representatives from agriculture, infrastructure, sports, business, weathercasters, and local characters.

2. [Collaborative Actions and Projects by Participating Organizations and Companies] (Scheduled for sequential updates)

Participating organizations will conduct communication activities in their respective fields to "end the too hot summer."

3. [Display of Untouchable High Temperature Index* on Symbol Board] (Date and location to be announced later)

A symbol board will be installed displaying the day's temperature alongside the "Untouchable High Temperature Index*."

*An index that numerically indicates that high temperatures, which would not have been experienced without climate change, are occurring right now.

Background and Purpose - Why This Week Now?

The average temperature in the summer of 2025 (June-August) was +2.36°C higher than the average year, setting a record high since statistics began. Recent hot summers have affected all aspects of life, from restrictions on children's outdoor play and club activities, cancellation of summer festivals, increased health risks for outdoor workers, to the impact on agricultural product prices. Scientists and the United Nations are issuing strong warnings that the situation will worsen if greenhouse gas emissions continue at current levels.

What is the "Week to End the Too Hot Summer"?

To make climate change a "personal issue" for each of us, we have determined that it is important to think about climate change during the hottest period of the year. As an opportunity for this, we registered August 8th as "Day to End the Too Hot Summer" (registered in 2025, led by JCLP). Starting in 2026, we aim to develop this commemorative day with many supporting organizations into the "Week to End the Too Hot Summer," with the goal of "collectively communicating about climate change as a personal issue at the same time."

Executive Committee and Cooperating Organizations

Executive Committee

Japan Climate Leaders' Partnership (Lead Organizer)

NPO Network of Weathercaster

Japan Local Character Association

Protect Our Winters Japan

Professor Masata Emori, University of Tokyo, Future Vision Research Center (Executive Committee Advisor)

Sponsorship

Tokyo Metropolis, Nagano Prefecture, Kawasaki City, Hamamatsu City, Hayama Town, Matsumoto City, Kitakyushu GX Promotion Consortium (Kitakyushu City, Kitakyushu Foundation for Promoting Science and Technology), United Nations Information Centre, Japan Sustainable Fashion Alliance, Japan Federation of Construction Contractors, Japan Desalination Research Center, Japan Sewage Works Association, Japan Football Association, The Japan Agricultural News "Midori GX Lab", Japan Youth Council

Cooperation

NHK Enterprises, Inc., Shibuya Future Design, SWiTCH, Midori Doctors, Media is Hope

Sponsoring Companies

Platinum

Tokyu Fudosan Co., Ltd., Seven & i Holdings Co., Ltd.,

Todakensetsu Corporation, I-GRID SOLUTIONS Inc.

Gold

Takashimaya Co., Ltd., Ricoh Company, Ltd., Asuene Corporation, Seiko Epson Corporation

Collaborative Actions by Participating Organizations and Companies (Scheduled for sequential updates)

Events/Communication, etc.

Midori Doctors: "Life Cannot Keep Up with This Heat" Messages from Medical Professionals on the Front Lines of Life

Renewable Energy Promotion Organization: Holding "Week to End the Too Hot Summer" Related Events / Releasing Statements of Support

Matsumoto City: Uchimizu Daisakusen 2026 (July 31)

Tokyo Metropolitan Government Bureau of Environment: Become the Editor-in-Chief and Create a Newspaper on "The Future of Our Planet"! | "My Home's Environmental Minister" (August 1)

Kitakyushu GX Promotion Consortium: Online Seminar "What is GX Anyway? Paris Agreement & IPCC Edition" (August 5)

Weathercaster Network: A Request from Weathercasters! Let's End the Too Hot Summer! (August 1 - August 9)

Japan Local Character Association: World Local Character Grand Prix "Award for Ending the Too Hot Summer" (August 7)

SWiTCH: HTT Innovators Talk (August 7)

[Separate Document] Details of the August 7 Flagship Event are here