special needs child; child with special needs
A formal term used in educational and welfare contexts to refer to a child requiring special consideration or support.
It is necessary to strengthen the support system for children with special needs.
This school has established special classes for children with special needs.
要配慮児 is a broader term that may include children needing various forms of consideration, while 特別支援児 specifically refers to children receiving special education under the formal special needs education system.
Compound of 要 (you, 'need'), 配慮 (hairyo, 'consideration'), and 児 (ji, 'child'). The term appears to be a modern coinage used in administrative and educational contexts.