Affair of the Four Abandoned Children of Nishi-Sugamo: What happened to the kids?

Affair of the Four Abandoned Children of Nishi-Sugamo: What happened to the kids? I recently watched the Japanese movie, "Nobody Knows" (Dare Mo Shirenai) which was loosely based on the tragic real life events covered in the Japanese press as, the "Affair of the Four Abandoned Children of Nishi-Sugamo"(??????????). I'm curious about the real story. What's happened to these children since then? They must be in their 20's now if they're still alive, i wonder what happened to them after that........but there are not many information i can find from the net, i'm sure there would be more information about it in japanese but i don't read japanese.........