Payment with "Rakuten Pay" and "Merpay" is now possible on the PS Store. You can directly purchase various digital games and downloadable content, and you can also use it to top up your wallet and pay for flat-rate services

Payment with "Rakuten Pay" and "Merpay" is now possible on the PS Store. You can directly purchase various digital games and downloadable content, and you can also use it to top up your wallet and pay for flat-rate services
By linking it to your account, you can purchase digital versions of games and downloadable content. It can also be used to top up wallets and pay for subscription services...

The linked article is in Japanese.