| Honorific-Prefix: | Sao |
| Edward Yang Kyein Tsai | |
| Native Name Lang: | zh |
| Office: | Saopha of Kokang |
| Term Start: | 1949 |
| Term End: | 17 May 1959 |
| Predecessor: | Yang Wen Pin |
| Successor: | Position abolished |
| Birth Name: | Yang Kyein Tsai (楊振材) |
| Birth Date: | 1918 |
| Birth Place: | Yamen, Kya Diling, Kokang |
| Death Place: | Lashio |
| Education: | Rangoon University |
| Nationality: | Burmese |
| Relations: | Jimmy Yang Kyein Sein (younger brother) Olive Yang (younger sister) |
Sao Edward Yang Kyein Sai (Burmese: စောယန်းကျိန်စိုင်း, 1918–1971) was the last traditional ruler (saopha) of the Chiefdom of Kokang from 1949, at the death of his father, saopha Sao Yang Wen Pin, until he abdicated in 1959.
Yang's sister, Olive Yang, was a prominent opium warlord, recruited by Khin Nyunt in the late 1980s to help broker ceasefires in Burma with ethnic rebel groups.[1]