One interesting thing: The special TOKKO people do have a pretty lousy job: They need to collect all the 108 pieces to get the whole box. However, all those special TOKKO people have also those shards inside them. So, when they have all the other pieces, will they also be themselves butchered to get the last ones? Or can the pieces be extracted without killing them? The tattoos and their skills demonstrate the shards have, to some degree, integrated with their bodies, so it's an open question whether they spend their days of retirement in a coffin.

Well, at least Shindou will have a jolly bunch of colleagues when he joins TOKKO.