Ryosuke Cohen and Brain Cell: A Collector's Guide
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If you're considering buying a Brain Cell work, this guide covers everything you need to know — the project's history, how the editions work, what to look for, and why Brain Cell occupies a unique position in the contemporary art market.
What Is Brain Cell?
Brain Cell is a mail art project initiated by Ryosuke Cohen in Osaka in 1985, and still ongoing. The format is simple: Cohen sends blank postcards to artists worldwide; they return them with drawings, stamps, stickers, and other hand-made or found material; he assembles everything onto a printed sheet and distributes it back to all participants. This cycle repeats every ten days.
The project has been running continuously for over 40 years. It has involved more than 6,000 artists from over 80 countries. Each edition is numbered sequentially — the current issues number in the thousands.
Why Is Brain Cell Significant?
Several things make Brain Cell unusual in the contemporary art landscape:
- Duration: A 40-year uninterrupted project is rare to the point of uniqueness. The project has now outlasted most of the institutions that existed when it started.
- Scale: 6,000+ participants from 80+ countries gives Brain Cell an archival dimension — it is a document of international artistic exchange spanning four decades.
- Institutional recognition: Cohen has been nominated for the Nobel Peace Prize by art critic and historian Bern Porter, who described the project as a sustained act of peace-making through artistic dialogue. The project has been exhibited internationally and documented in institutional collections.
- Uniqueness of each sheet: Every Brain Cell sheet is assembled once, from specific material received from specific artists at a specific time. No two sheets are the same, and there are no reprints.
How the Editions Work
Brain Cell editions are numbered sequentially. Each sheet represents one mailing cycle — the assembled material from artists who responded in that round. A set covering issues 1071–1105, for example, contains 35 sheets, each a distinct composition.
Within a set, the sheets document the evolution of the project over time: you can trace how the composition changes as different artists participate, as Cohen's assembly style develops, as the project's geography shifts.
What to Look for When Buying
- Edition number and set range: Later editions are not necessarily better — but knowing the issue numbers allows you to date the work and understand its position in the project's history.
- Condition: Sheets should be flat, without creases or discolouration. Brain Cell sheets are typically printed on standard paper, not archival stock, so storage matters.
- Provenance: ART & DAY sources Brain Cell editions directly from the artist and is the only online gallery with official sales rights for the project.
Available at ART & DAY
We currently stock the 35-sheet set (issues 1071–1105) as a complete set, as well as individual sheets from select editions. All Brain Cell works ship worldwide from Tokyo with duties included (DDP).
This is the first official online sale of these editions. They were previously available only through direct contact with the artist or through in-person exhibition sales.