here is a review of Journey to Agartha by Joey of The Nerd Cabinet.
"Hoshi o Ou Kodomo (otherwise known as Children Who Chase Lost Voices in the US and beyond), is one of those films you can watch as a child but never really understand until you have experienced some of the themes highlighted. They vary from heartbreak to lost love, deep friendship to whirlwind adventures. Please note that this review was taken from when I was writing on a blog a while back that is no longer running.
The story in itself is a journey; a journey for the characters; a journey for the viewers, and even a journey for Makoto Shinkai."