Toshinori Miyakoshi
From Openwaterpedia
Toshinori Miyakoshi is a Japanese observer in the Tsugaru Channel in northern Japan.
Open Water Swimming Highlights
- On 4 August 2025, he observed Bengisu Avci of Turkey who completed a 19.5 km crossing of the Tsugaru Channel from Aomori Prefecture to Hokkaido in northern Japan in over 14 hours at the age of 28 under the escort of Captain Yoshimi Kawayama, Deputy Captain Norihito Ota, observer Yuka Ito, and observer Toshinori Miyakoshi.
