This book didn't grab me right away...in fact I put it down twice, but once I got past first 50 or so pages, it didn't matter.
The book tells the story of the ambitious Aki, the first person to see the construction of the ring around the sun. As the story unfolds, we see her great desire to make first contact and how this desire is channeled. The story shows a woman who continues to follow her earliest ambitions to the end. However, this ambition seems to come at a great cost to her, personally. I've read some Japanese horror/sci fi in the past and have come to expect characters that aren't as developed as they could be...there isn't a lot of writing with a great depth and breadth of emotions. Maybe it was the limitations of the short story format (as the three parts were originally short stories) but I wanted more about Aki.
However, the actual contact at the end is interesting and worth the read. It literally took my breath away as I read the descriptions of the aliens and the way they acted when confronted by the humans. It really took the whole idea of first contact and turned it upside down--actually imagining something completely alien is something that not only takes guts--your aliens could be so alien that the reader doesn't see them as "real characters" (ala Aliens in Aliens) or they become too much like humans--but also real skill on the part of the writer. And while I love Schismatrix, Bruce Sterling's aliens,seemed parodies of aliens, while these aliens truly seemed alien in a good, interesting, yet strange way. This was great balancing act on the part Nojiri. We got aliens that were really alien and yet managed to be human as well. This is really what saved the whole book for me.
If you haven't read Japanese fiction before, you might want to try something else first, but if you want a great first contact book, this might be it.