It would be interesting to hear the point of view from a Japanese on those numbers. How is the dating scene? Are those numbers surprising or matching with your own experiences?
According to 4/2chan posters from Japan it's all about money. Men are expected to have a career by age 30something and be set for a family, if they don't it's seen as shameful so they don't try to date. Too many low paying jobs, with fleeting job security, and no support for single women to raise a family.