Postmarks of Japan

As much as I am intrigued and excited seeing the beautiful and imaginative postmarks on a cover from Japan, I am equally at a loss to find out any material about them.. most of the links lead me to Japanese, and they are worse than Latin to me !! So until I learn Japanese or get a Japanese friend to tell me about each postmark, this space will be the place to save all the covers I receive with those beautiful brown pictorial postmarks :) 

Le petite prince postmarks 

A stamp exhibition special postmark