Is ja a word in scramble?

Excuse me, could you please clarify something for me? I've been wondering, is the word "ja" actually a valid word in the game of Scrabble? It seems like a unique word, and I'm curious if it's officially recognized and allowed to be played on the Scrabble board. I'd appreciate it if you could verify whether or not "ja" is indeed a word that can be used in the game, and if so, what its point value would be. Thank you for your assistance!