




The theme of the 2025 Osaka-Kansai Expo is "Life."
Seiko will create a place where visitors can learn about the history of life on Earth, think about our shared future, and feel the joy of living — all through exciting experiences with Time.
Signature Pavilion

Playground of Life: Jellyfish Pavilion
At the center of the Osaka-Kansai Expo venue, there will be "Signature Pavilions" led by eight producers. Seiko is sponsoring the Signature Pavilion "Playground of Life: Jellyfish Pavilion," produced by Sachiko Nakajima.

Signature Event

Osaka-Kansai Expo
Official Character: Myaku-Myaku
©Expo 2025
A sundial representing
the evolution of Life
Seiko Jellyfish Sundial Exhibition
Let us consider two very different topics — jellyfish and the Sun. Jellyfish emerged at a very early stage of life on Earth, and it is said that they are one of the predecessors of all living beings. The Sun is essential for the growth of life as we know it. The sundial was humanity's first clock, and it, too, is fundamental to the evolution of human life.
We were inspired to combine these two disparate elements that were so important to life and to human evolution, and so we created a “jellyfish sundial” expressly for the Osaka-Kansai Expo. It will be prominently displayed at the "Playground of Life: Jellyfish Pavilion."

Jellyfish Sundial Location
Central Signature Zone, on the lawn within the Playground of Life: Jellyfish Pavilion
Exhibition Period: During the Osaka-Kansai Expo
Note: Images are for illustration purposes only. Actual layout and building shapes may differ. Unauthorized reproduction or copying of these images is strictly prohibited.

Humanity and Time Workshop
Toki-iku - Making a Sundial
We will also hold the sundial edition of the "Seiko Exciting Clock Classroom" at the Osaka-Kansai Expo.
This workshop will explore the theme of "humanity and Time." By building a sundial, the first timepiece ever created by humans, participants will learn about how people have engaged with time throughout history and how that changed their lives. We will also encourage all participants to think about their own future.
Workshop Content

Introductory Lecture
1. About Time and Celestial Bodies
Learn about the history and function of clocks. What have humans done in the quest to understand time? Learn about the evolution and history of ancient time measurement using natural forces, starting with the sundial, which was developed 7,000 years ago.

Workshop
2. Make Your Own Sundial
After learning about the mechanics of sundials, participants will have a chance to build their own, unique sundial. We will present an original Expo version sundial.

Experiment
3. Sundial Experiment on the Lawn of the Jellyfish Pavilion
Finally, we will move to the lawn of the "Playground of Life: Jellyfish Pavilion" and experiment with the sundials everyone has made! The best way to understand how a sundial “moves” with the sun is to observe one in operation.
Note: Workshop content is subject to change. Current information will be posted on this site as it becomes available.
Osaka-Kansai Expo Sponsorship
Overview
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Official Name
2025 Japan World Exposition
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Theme
Designing a Bright Future for Society
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Dates
April 13, 2025 (Sun) - October 13, 2025 (Mon), 184 days total
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Location
Yumeshima, Osaka