Sencha?

[xkagomex]

I'm making green tea truffles and the recipe asks for Matcha powder and Sencha. Are these different things? It tells me to grind up the Sencha and sift it because I only want the powder. I googled it and it appears to just be a type of green tea. I know I can get matcha at the Japanese market, but what about Sencha? Is it pretty easy to find? Is that even what it is?

I think I am confusing myself. Help? =)