1966 | Born in Mashiko, Tochigi Prefecture
1987 | Graduated from Tokyo Designer Academy, Department of Industrial Crafts
1987 | Received an Encouragement Award at the Graduation Exhibition
1988 | Completed research at the Tochigi Prefecture Ceramics Support Center (formerly the Tochigi Prefecture Ceramics Guidance Center)
1989 | Worked as the second generation potter under his father, Otsuka Kiyoaki, at Kiyoshi-gama
2003 | Founded "Project Mashiko" and served as its representative
2004 | Cooperated in the production of Miyakeyaki, a pottery made from volcanic ash, as part of Miyakejima Island reconstruction support.
Produced footage broadcast on NHK and TBS
2005 |Selected for the 79th Kokugakai Exhibition for the first time
Since then, he has been selected for the 81st, 83rd, 85th, 86th, 87th, 88th and 89th competitions
2006 | Received the Encouragement Award at the 80th Kokugakai Exhibition
2007 | Selected for the 61st Tochigi Prefectural Arts Festival
Since then, he has been selected for the 62nd, 65th, and 66th competitions.
2009 | Winner of the runner-up prize at the 63rd Tochigi Prefectural Arts Festival
2010 | Received the Art Festival Award at the 64th Tochigi Prefectural Art Festival
2013 | Received the Encouragement Award at the 28th Tochigi Prefectural Arts Festival
2014 | 5th Mashiko Ware Traditional Craftsman Certification
2015 | Member of the Tochigi Prefecture Artists Association
2016 | Associate member of the National Exhibition