。
Noguchi Hideyo was a great man.
Literal
Noguchi-Hideyo [topic-は] great person was.
Reference to Noguchi Hideyo (1876–1928), a famous Japanese bacteriologist known for his research on syphilis and yellow fever, who died of yellow fever while studying the disease in Ghana. He appears on the ¥1000 note. 偉大 ('great, eminent') is a na-adjective typically reserved for historical figures and major achievements.