We may very well have decent sex robots in 2019, even now there are some robots who can move as sinuously as a human, problems are weight and of course price of components. We already have silicone dolls which are so lifelike it's unbelievable, but they cost more than 3000$. Given I worked with people that are in the robotics field, I agree 2025 will most likely be the period when these will be common place, but we already are close to the uncanny valley.
According to government figures released in 2010, there are 700,000 individuals living as hikikomori with an average age of 31
It's not only Japan who has this problem, in my country, Italy there are so many unemployed young men and women between 18 and 30 that aren't even looking for a job and because of this they are afraid of social interactions or they feel that they don't belong out there. This phenomenon will be much large than you expect.