Yumito Ebisawa (海老沢 弓人 / 海老沢 弓夫 )
His given name is Yumito (弓人) in the manga, Yumio (弓夫) in the anime.
Kindaichi Shounen no Jikenbo
Supporting
Kindaichi Shounen no Jikenbo: Case Series
Yao, Kazuki