What do people mean when they talk about Japan purging it's collective guilt after WWII?

by RestlessBeef

I have heard this phrase a lot and in reference to a wide variety of contexts but have little to no idea what this actually means. Can someone help me out or at least point me in a direction please and thank you.

Georgy_K_Zhukov

More can be said on this, but /u/asiaexpert responded to a related question which you might find insightful.