On 25 March, World Wide Fund for Nature Japan (WWF Japan) will host one of the world’s largest environmental events, Earth Hour. The event will take place from 8:30 pm to 9:30 pm (Japan Standard Time) and encourages individuals to show their commitment to preventing global warming and conserving biodiversity by turning off lights for one hour.

Since its launch in 2007, Earth Hour has grown into a global grassroots event with over 190 countries and regions participating. The event begins in South Pacific countries and the lights-out relay travels around the world as the local time reaches 8:30 pm.
In addition to raising awareness about climate change, Earth Hour 2023 will also focus on the issue of loss of nature and biodiversity. These two issues are inextricably linked as nature is crucial for our well-being, prosperity, and survival, providing us with food, water, air, and more. To reverse the trend of biodiversity loss by 2030, Earth Hour has revamped its brand image with a clock motif to convey a sense of urgency.
WWF Japan has set up a special site for Earth Hour 2023 and is encouraging as many people as possible to participate in the lights-out action and share their thoughts on the Nature Positive goal. The site will also provide information on participating facilities and Earth Hour-related projects.
Earth Hour is a powerful event that brings everyone worldwide together to display their commitment to protecting the environment. By focusing on both climate change and loss of nature and biodiversity, WWF Japan is hoping to create a ripple effect and inspire action for a more sustainable future.
Read about climate change and Japan
- 2025-11-18: Fossil of the Day again: Criticism at COP30 for Japan’s fossil fuel push
- 2025-11-08: CAN Japan criticises weakening climate commitments and leadership
- 2025-10-21: Kyoto to rally support for Japan's Youth Climate Lawsuit
- 2025-10-20: Tohoku University climate activist story premieres in "Michinoku Denki"
- 2025-07-31: 350.org Japan demands stronger climate action after Japan election
