Ogawa deserves the Akutagawa she received, but I'm not sure about her chosen genre. The novel is it's length for a reason: a prose work long enough to capture an entire life or failing that an entire viewpoint about a human life. A short story gives one brief effect or emotional trick, without any attempt to capture attention sufficiently for a large investment of time.
what is a novella? why write these things? Ogawa is skillful and her prose / advancement of plot restrained, elegant, and perhaps even near-moving, but I'm left wondering if she's a frustrated novelist or an over-indulgent short story-teller. good effect, but will she really break out out of her current ability level?