The Japanese government wants to double, to approximately 40%, the percentage of consumer transactions which use some form of payment rails.
(This fact is reasonably public; c.f. horse's mouth here: about.paypay.ne.jp/pr/pr20190808_… )
You have to ask which large Japanese tech company splashes 9 figures of USD at a time out of conviction that a new market is going to eventually be massive and they'd prefer to own all of it? ;)