Previous experimental demonstrations of "Koetra", carried out by the National Institute of Information and Communications Technology, are presented below.

2012

• Kumamoto Deaf School
• Saga Deaf School
• Miyakonojo-Sakura Deaf School

2013 ~ 2014

• OMRON TAIYO CO.,Ltd

• Kumamoto Prefectural School for the Deaf
• Miyakonojo-Sakura Deaf School
• Oita Deaf school
• Miyagi Deaf School
• Osaka City School for the Deaf

• Kumamoto deaf Information Center
• Nagasaki deaf Information Center
• Niigata deaf Information Center
• Sakai deaf Information Center