Extra Region Sudoku (Fun With Sudoku #65)

Indian Sudoku Championship 2015 will be held on 28th June 1015 and Extra Region Sudoku is one of the Sudoku types appearing in this championship. Till Now I was having very few Extra Region Sudoku puzzles published on this blog. This is my second 9x9 Sudoku of ER Sudoku type and I am publishing it so this can be a practice puzzle for this ISC 2015. This Sudoku is an easy Sudoku of this type. Earlier Sudoku is published with the title Extra Region Sudoku (Daily Sudoku League #26).

This Extra Region Sudoku, I am posting as the 65th Sudoku in the Fun With Sudoku Series. Can you solve this Extra Region Sudoku puzzle?

Rules of Extra Region Sudoku

Classic Sudoku Rules apply. Additionally, each extra region must contain digits from 1-9. The extra regions are of 9 cells each and are shaded in the grid.