404. That’s an error.
The requested URL /_/+1/confirm?hl=jp&url=http%3A%2F%2Fwww.mikihiko.com%2Fblog%2F%3Fp%3D5918&title=%E5%AE%8C%E6%88%90 was not found on this server. That’s all we know.
/_/+1/confirm?hl=jp&url=http%3A%2F%2Fwww.mikihiko.com%2Fblog%2F%3Fp%3D5918&title=%E5%AE%8C%E6%88%90