Zutsu NoteZutsu Note
Woman pressing her temples
Hirotaka Maekawa, MD, headache specialist

Headache specialist and app developerHirotaka Maekawa, MD

With a headache diary,get to know your headaches.

  • Completely freeAll main features
  • Pressure forecastA week ahead, where you are
  • Auto-share with your doctorOnce you add your clinic

Zutsu Note is a headache diary app made in Japan ("zutsu" means "headache" in Japanese). Its charts show how your headaches relate to pressure, sleep, and medication, and you can show them right to your doctor at your visit.

Zutsu Note app icon

Zutsu Note

Headache diary app

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For clinics

Zutsu Note's
3 key features

See your headache patterns in charts

Log your headaches, barometric pressure, sleep, and medication together, and the charts start to show when you tend to get headaches. The Stats tab also shows your headache days each month and how well your medicine works. In the app, you can check the pressure forecast for where you are, up to a week ahead.

Daily chart

A daily log that's fun to keep up

Each time you log, your character Maple grows, and you earn points to collect items for Maple's room. If you only want to keep a log, switch to Simple view, which hides the character.

Maple grows as you log

Take your log straight to your doctor

Just add your clinic, and your log shows up on your doctor's computer. If your clinic isn't connected, you can still show a 30-day summary on screen or as a PDF. You can remove the link anytime.

Progress notes
Changes before and after visits

* Screens show sample data

Start logging for free

Built by a practicing headache specialist

Hirotaka Maekawa, MD, headache specialist

Headache specialist and Zutsu Note developer

Hirotaka Maekawa, MD

Neurologist and headache specialist in Japan
Full-stack engineer

Sees patients in Japan as a neurologist and headache specialist, and built Zutsu Note himself as a full-stack engineer. Uses it every day in clinic.

CredentialsBoard-certified headache specialist, Japanese Headache Society
Board-certified neurologist, Japanese Society of Neurology
Board-certified internist, Japanese Society of Internal Medicine
2012–2018Juntendo University School of Medicine
2018–2020Junior residency, Tokyo Teishin Hospital
2020–2023Department of Neurology, The University of Tokyo Hospital
2023–Sees patients at headache clinics in Tokyo and Saitama
Visiting Lecturer, Department of Neurology, Showa Medical University
2025–Founded Iris Wellness, the company that develops and runs Zutsu Note

FAQ

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Zutsu Note is a headache diary app from Japan ("zutsu" is Japanese for "headache"). Sign up free in a minute. All main features are free.

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