Mitsutarō Yamaoka (Japanese: 山岡光太郎; 7 March 1880 – 23 September 1959), also known as Umar Yamaoka (Japanese: ウマル・ヤマオカ) was a Japanese Islamic scholar known for being the first known Japanese pilgrim to Mecca.
Source: “Mitsutarō Yamaoka”, English Wikipedia (CC BY-SA 4.0), excerpt