Why a clock, from a physician whose grandmothers are almost 100.

Tokei (時計) means clock in Japanese. The clock drawing test has been a first-line cognitive screen in clinics around the world for decades — a small piece of paper that can reveal memory, planning, and executive function problems in a few minutes. I named this company after it because it is the most direct, honest tool we have to start the conversation.

I am a physician. I went to medical school at the University of Tokyo and trained in emergency medicine at Maimonides Medical Center in Brooklyn. In my previous company, Isha Health, I built ketamine care for treatment-resistant depression. Tokei is the next project, focused on the other end of the brain-health spectrum: cognition, aging, and early dementia screening.

My two grandmothers in Japan are approaching 100 years old. Watching them age from across the ocean — and watching how hard it is for my family to know when to worry — is the real reason this exists. Early dementia is often noticed first by someone who loves the person. They don’t have a neurologist on call. They don’t have the Mini-Mental State Examination memorized. What they need is a simple, quiet, trustworthy way to check, at home, in a few minutes, with clear guidance on what to do next.

That is what Tokei is. The clock drawing test, free, online, honest about its limits. No waitlist, no paywall, no dark patterns.

Content on this site is reviewed by a licensed physician before publication. I wrote or reviewed the initial articles. As we expand, we will engage named specialists in geriatric neurology, geriatric psychiatry, and gerontology to review subject-specific content, and we will credit them openly on each piece.

The clock drawing test itself is a screening tool, not a diagnosis. Our tone, our educational content, and the product itself reflect that. If you or someone you love has a concerning result, we will always point you toward a real clinical evaluation.

Tokei Health is a product of Coadia, Inc., a Delaware corporation headquartered in San Francisco. We operate under a single privacy policy. You can reach the team any time at support@clockdrawingtest.com.