Released an open-source tool that reproduces course congestion with Monte Carlo methods, visualizing the impact of cutoff settings and field size.

A critical review of RUN+TRAIL’s Kaga Spa feature. Outlines missing issues and proposes improvements from a reader’s perspective.

Examines why Japan’s specialty media stayed silent on Kaga Spa’s operational problems, with a critical look at sponsor relationships and editorial posture.

In extreme heat, supply shortages and transport chaos cascaded into an abnormally high DNF rate. Analyzes the clash between UTMB standards and OSJ’s philosophy.

Synthesizes testimonies on Kaga Spa by UTMB’s operational flaws, highlighting congestion, supply shortages, and DNF-handling confusion, and calls for improvements.

However, since ahamo appeared in March 2021, several Japanese services have introduced plans that allow overseas data roaming as is for a monthly fee. However, since ahamo was introduced just as the Corona Disaster was happening,

If you are a trail runner in Japan, you may have once wondered why there is no by UTMB race in Japan. The following races in Asia near Japan have already been designated as by UTMB (as of March 2023).

Prior to the coronavirus, entry to any marathon was by lottery, and it was not always possible to run. However, when the new coronavirus raged around the world in 2020, marathons around the world were either cancelled or drastically scaled back (for elite runners only), and I suspect that the opportunities to run a marathon were greatly reduced for the next three years.