Ryūsaku Tsunoda

was a Japan academic and Japanologist. He is known as the "father of Japanese studies" at Columbia University. 
Career.
Tsunoda was responsible for the early growth of the Japanese language and literature collection at Columbia's library. 
Tsunoda's best known students was Donald Keene. Keene's opinion of Tsunoda was explaind in a lecture given at Waseda University in 1994:
According to Sir George Sansom, Tsunoda was the "father of Japanese studies in America".
Selected works.
In an overview of writings by and about Tsunoda, OCLC/WorldCat lists roughly 50 works in 100+2 publications in 4 languages and 2,000+ library holdings.