For some reason I really like expressions that have to do with nature/animals. We already had a Monkey expression and I know of some Horse expressions, but today, we honor the Frog.
Reading: i-no naka-no kawazu
Meaning: a person who is ignorant of the real world, similar to the English expression "to live in a bubble"
Literally: a frog in a well
But why a frog in a well?
Actually this is a short version of the longer expression, that will explain everything.
Reading: i-no naka-no kawazu taikai-wo shirazu
Literally: a frog in a well is not aware of the ocean
This is used to encourage someone to get a wider perspective.
Aaaa-nyway, to avoid poluting a perfectly great expression with my stupid comments, I will cease typing now.
Wait... Me Likey very much(y)!