I work full-time for a company in Japan. Years ago, on an overseas posting, I lived on late-night ramen and business dinners. In 2017 I ran my first painful kilometer along a waterfront promenade. I haven't stopped since.
Today I run 10 km every morning, race on roads and trails, and lead MOSC, a relaxed running club of about 40 runners in Ibaraki, where the fastest runner always matches the slowest. I wrote a Japanese book for people who start running after 40. It reached #1 in four Amazon Japan categories, and the English edition, Run After 40, is now on Kindle (Amazon · readers' page).
My main race of the year is the Hasetsune CUP, a 71.5 km mountain endurance race that runs through the night on the trails of western Tokyo, with no food aid stations along the way. I finished it in 2025 in almost exactly 14 hours. In October 2026 I went back to take 30 minutes off that. The day turned hot, I had packed a little less water than the year before, and at 42 km, with my stomach refusing food, I stopped. It was my first DNF. That day taught me more than any finish: how much water this course really needs, and how to train your stomach for long hours on the trail. Those are exactly the things I'll tell you before you race in Japan.
Racing abroad, I learned what it feels like to stand at a start line in a country that isn't yours. A local who explains the small things changes the whole day. I want to be that person for you in Japan.
Based in Ibaraki, 40 minutes from central Tokyo. Fumitaka Momose is my pen name. Follow along on X (@fumitakaruns).