Hideo Kojima's Xbox Project Is Still Underway - Report - GameSpot

As of a couple of weeks ago, his Xbox collaboration is still going.
Death Stranding is a PlayStation 4 exclusive from Hideo Kojima's new studio.

In 2015, Konami Had A Very Strange Year

Konami News, Rumors and Information - Bleeding Cool News Page 12

E3 2019 Rumors And Leaks: New Xbox Scarlett & Elden Ring Confirmed - GameSpot

News - July, 2021

Chris Torossian, Author at KeenGamer

News - July, 2021

Hideo Kojima making Xbox exclusive cloud game – won't say what it is

The next Hideo Kojima game could be revealed at Gamescom 2022 - Xfire

CD Projekt sales up but GOG struggles

Kojima Productions reportedly in talks with Xbox to publish next project