An independent publication by Minjun Park.

I am an independent researcher and engineer based in Sapporo, Japan. I study infectious-disease dynamics, the structure of time series, and the systems that make research reproducible.

My work sits between medicine, statistics, and computing. I am in the medical degree course at Sapporo Medical University, take a statistics degree at Korea National Open University alongside it, and studied data science at Hokkaido University before that. I started programming in November 2020 and work as a freelance AI engineer; I also run Miraijuku, an academy that prepares students for Japanese university entrance.

This site is the public record of that work: study notes, research write-ups, documented projects, and essays. Current writing is edited for reproducibility and usefulness; older posts keep their original dates and routes as an archive of what I was learning at the time.

Background

Current work

Representative of Miraijuku; freelance AI engineer

Programming since

November 2020

Awards

2012 Korean Mathematical Olympiad (2nd round silver; 1st round national and Seoul silver) · 2012 Korean Physics Olympiad (silver)

Education

Sapporo Medical University

Medicine, 2025–

Korea National Open University

Statistics, 2024–2026

Hokkaido University

Data science, 2019–2023 · full government scholarship through the Korea–Japan Joint Science and Engineering Student Program

Sejong Science High School, Seoul

Attended, later withdrew

What I work on

• Research — Infection dynamics, circadian and time-series structure, and reproducible statistical analysis. Each project ships with its data, preprocessing, and code so the result can be re-derived.
• Writing — Long-form technical explanations, study notes, and essays, edited against a written style guide and published in English, Korean, and Japanese.
• Security — Cryptography, protocol design, and capture-the-flag work documented step by step so the reasoning can be audited.

Selected work

• Nocturnal rest–activity transition instability — NHANES 2013–2014 analysis, with data, preprocessing, and statistics released together.
• CV — The full record: research questions, publications, and the complete publication history.