Unraveling Race Congestion 1,200 vs 500 Participants — Why the DNF Rate Changes Dramatically Code for Trail
Simulates how participant counts affect congestion and DNF rates, and proposes operational design improvements.
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Code for Trail Built a tool to simulate congestion in trail running races
Released an open-source tool that reproduces course congestion with Monte Carlo methods, visualizing the impact of cutoff settings and field size.
What kind of perspective is required of a specialized magazine A Consideration of the Kaga Spa Trail Feature Article in RUN+TRAIL Magazine
A critical review of RUN+TRAIL’s Kaga Spa feature. Outlines missing issues and proposes improvements from a reader’s perspective.
Kaga Spa by UTMB Management Issues Silent Domestic Media
Examines why Japan’s specialty media stayed silent on Kaga Spa’s operational problems, with a critical look at sponsor relationships and editorial posture.
Race on the Brink Report on the Operational Failure of the 2025 Kaga Spa Trail Endurance 100 by UTMB
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.
Kaga Spa Trail Endurance 100 by UTMB receives a storm of critical acclaim
Synthesizes testimonies on Kaga Spa by UTMB’s operational flaws, highlighting congestion, supply shortages, and DNF-handling confusion, and calls for improvements.
Mobile Communications in Overseas Expeditions. The story of switching to Rakuten Mobile because quality docomo was completely finished
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,
Will there ever be a by UTMB race in Japan
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).