Ryuichi Sakamoto was born on January 17, 1952.
Ryuichi Ogata was born on December 17, 1985.
Nope, they're not related at all. Ryuichi Sakamoto is a famous Japanese musician and composer, while Kyu Sakamoto was a singer known for the hit song "Sukiyaki." So, unless they have some distant cousin connection that I'm not aware of, they're just two Sakamotos doing their own thing in the music world.
Ryuichi Snow's birth name is Ryuichi Suno.
Ryuichi Yokoyama was born in 1909.
Ryuichi Kaji died in 1978.
Ryuichi Kaji was born in 1896.
Ryuichi Obitani was born in 1908.
Ryuichi Moriya was born in 1985.
Ryuichi Doi was born in 1939.
Ryuichi Nishida goes by Ryu.
Ryuichi Sakamoto was born on January 17, 1952.
Ryuichi Ogata was born on December 17, 1985.