- 2024/06 - 現在 Research Institute for Animal Science in Biochemistry & Toxicology
- 2023/04 - 現在 (国研)農業・食品産業技術総合研究機構
- 2021/04 - 2023/03 National Agriculture and Food Research Organization
- 2019/04 - 2021/03 National Agriculture and Food Research Organization
- 2018/04 - 2019/03 National Agriculture and Food Research Organization
- 2016/04 - 2018/03 National Agricultre and Food Research Organization, MAFF kyushu Okinawa Agricultural Research Center, NARO Director-General
- 2015/04 - 2016/03 National Institute of Agrobiologica Sciences, MAFF Research Director-General
- 2011/10 - 2015/03 National Institute of Agrobiologica Sciences, MAFF Research Director-General
- 2008/04 - 2011/09 National Institute of Agrobiologica Sciences, MAFF Devision of Animal Science Director
- 2006/04 - 2008/03 Ministry of Agriculture, Forestry and Fisheries
- 2005/04 - 2006/03 Ministry of Agriculture, Forestry and Fisheries
- 2003/10 - 2005/03 National Agriculture Research Organization, MAFF Devision of Animal Physiology and Nurition, National Institute of Animal and Grassland Sciences Head of Ruminant Energy Metabolism Lab.
- 2004/07 - 2004/12 Ministry of Agriculture, Forestry and Fisheries
- 2002/04 - 2003/09 National Agriculture Research Organization, MAFF Devision of Animal Physiology and Nurition, National Institute of Animal and Grassland Sciences Head of Ruminant Energy Metabolism Lab.
- 2001/04 - 2002/03 National Agriculture Research Organization, MAFF Devision of Animal Physiology and Nurition, National Institute of Animal and Grassland Sciences Head of Rumen Microbiology Lab.
- 1999/04 - 2001/03 総理府 科学技術政策局政策課 専門調査官併任
- 1999/04 - 2001/03 Ministry of Agriculture, Forestry and Fisheries
- 1998/04 - 1999/03 Ministry of Agriculture, Forestry and Fisheries
- 1992/04 - 1998/03 National Institute of Animal Industry, MAFF Devision of Animal Nutrition Senior Researcher
- 1991/01 - 1992/03 National Institute of Animal Industry, MAFF Devision of Animal Nutrition Researcher
- 1981/07 - 1990/12 Kyushu Agricultural Experimental Station, MAFF Devision of Animal Production Researcher
- 1981/04 - 1981/06 Ministry of Agriculture, Forestry and Fisheries