Which Asian countries use chopsticks originally?

Drew asked:


I know in China and Japan, people eat regularly with chopsticks but what about other Asian countries such as Korea, Thailand, Malaysia, Vietnam, Laos, Cambodia, Singapore, Indonesia, Tibet, Philippines……

I am not talking about getting chopsticks in the restaurant, they pass those out everywhere like candy.

I am Indian so I know that the Indian subcontinent (India, Pakistan, Bangladesh & Sri Laka) does not use chopsticks!
**** People, I didnt ask about the history of chopsticks or where they originated! My question is simply what countries use chopsticks!

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