[2] He was eleventh at the 2005 World Half Marathon Championships, which was good enough to help Japan finish third in the team competition.
He won the Kagawa Marugame Half Marathon in 2006, breaking a run of wins by Kenyan runners.
The time was 1:28:00 hours – a mark which stood for over two years, eventually being beaten by Haile Gebrselassie in September 2009, en route to his marathon world record run in Berlin.
[4] Matsumiya competed at the 2007 Rotterdam Marathon and was pleased despite being defeated by Joshua Chelanga as the Japanese set a personal best of 2:10:04 to finish in the runner-up spot.
[5] He represented Japan in the 5000 metres at the 2007 World Championships in Athletics but did not manage to progress into the event final.