Riki is of Japanese origin and means "league, group". It's a unisex name but has traditionally been used more for males. The name is composed of two kanji characters: 理 (ri) meaning "principle, logic" and 紀 (ki) meaning "record, chronicle". Riki is pronounced as /ˈriːkɪ/ in English.
The name Riki appears to have gained popularity in the mid-20th century, with a noticeable spike beginning in 1967 and peaking in 1975 and 1976, each year seeing 30 births. After these peak years, the number of annual births gradually decreased over time, with fewer than 10 births per year occurring since 2008.