Yes, JUDICATURES is a Scrabble word!

Letter values in Scrabble US: J 8, U 1, D 2, I 1, C 3, A 1, T 1, U 1, R 1, E 1, S 1.

Is it a valid word?

JUDICATURES is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

an assembly (including one or more judges) to conduct judicial business
the system of law courts that administer justice and constitute the judicial branch of government
the act of meting out justice according to the law
the position of judge

Also: judicial system.