One Heart Project
A participatory mosaic art project. Send one portrait photograph and it becomes one piece of an artwork built from thousands of others. Your face stays in the place it is given, and an artwork is finished only when every place in it is filled.

How one artwork is made
Choose an artwork. Back it with ¥500. Send one portrait photograph. Your photo is placed as a single piece and stays in that position. When all 2,500 places are filled, the artwork is completed and delivered to everyone inside it.
Nothing is generated to fill a gap. Every piece is a real person.

The collection
Read in order, the twenty-three artworks trace one life: being born, becoming yourself, meeting others, and connecting. Twenty-two carry a face each. The twenty-third is where they come together, and it is built from 5,000 portraits instead of 2,500.























The hidden second side
Every piece has a reverse. The front carries your face; the back carries your name or initials. The reverse sides of all twenty-three artworks are built from names — and when they are turned over and brought together, they form another image entirely.
That image is the reason this project is called ONE HEART.


What you receive
You receive one certificate for every piece you hold. It shows the artwork number and title, your piece number and its exact position, the date of completion, and a certificate ID with QR verification.
Every certificate you hold is linked to a single member ID — one per person. It is how ONE HEART recognises you as the project continues. Everything is delivered digitally; nothing is shipped.

How to join
One place in each of the 22 artworks, and two places in ONE HEART. Twenty-four in total. Participation opens on Kickstarter.