Japanese:
* As a name: "Shiki" is pronounced shee-kee with a long "ee" sound.
* As a word: "Shiki" can be pronounced shee-kee or shee-ki depending on the word and its meaning. For example, "四季" (shiki) meaning "four seasons" is pronounced shee-ki.
English:
* As a name: "Shiki" is often pronounced shee-kee in English as well, but it can also be pronounced shi-kee with a short "i" sound.
Therefore, it's best to check the context or ask the person how they pronounce it if you're unsure.