Here is an interesting (but badly translated) story from the Dong-a Ilbo about Ikeda Masae and how he has dealt with his guilt from the 1940s.
His guilt stems from when he was a Japanese teacher in Bangsan elementary school in Seoul during WWII.
Towards the end of the war he was ordered by the Japanese General Government to send as many female students as possible to the war plant in Toyama. So he coerced some young Korean students into going to Japan by saying the working and living conditions would be good for them there.
Unfortunately there is a big hole in the article here because it does not say exactly what happened the girls in Japan. It only says that he tried to contact them after the war to say sorry but only one of them would agree to meet him.
The suggestion by the Dong-A is that they ended up working as comfort women but it is not explained clearly in the article.
Also the story goes on to say that he sent between 1,000 and 1,500 New Year’s cards out every year to ensure as many Japanese people as possible read his confession and atonement until his death last December.