True, but it's important to understand what type of men Japanese women are still interested in.
The number of Japanese men who'd wear a Seiko TV watch (or show whatever modern day equivalent signifier of inceldom) has grown significantly bigger than the number of Japanese men who display the traits that Japanese women would like to see in a partner.
If we're going to do a one sentence summary here, it's "Japanese men don't enter the dating world without a job, and if they don't get that after college it won't ever happen".
That's only one of the subcultures who can't get a date. I was rather talking about who do have a steady job, i.e. are "Salariman", but in nerdy careers, i.e. tech, accounting, back office, etc. and have given up, or never tried, to be physically attractive to potential mates. The types who have lots of disposable income and would roam the streets of Akihabara to buy manga and go to maid cafés, or drop by Yodobashi to get a Seiko TV watch.
That's not a small subculture in Japan, and Japanese women are absolutely repulsed by them.