第一人者 (daiichininsha) Japanese meaning | KotomoraHe is a leading figure in Japanese robotics.
As a foremost expert in this field, she gives many lectures.
Usage patterns
〈事〉の第一人者the leading figure in (a field)
He is the leading figure in modern medicine.
第一人者として活躍するto be active as a leading figure
She is active as a leading figure in robotics.
第一人者になるto become the leading figure
He became the leading figure in that field within a few years.