Now that Like a Dragon: Infinite Wealth has released the series director Masayoshi Yokoyama has explained that when making this game he was influenced by Ringo Sheena’s music to the point where he felt he must have her song inside the game.

From Yokoyama-san:

This is the song that had the most influence on me when creating the story of Ryu 8.
Everyone who wished to be used as they are, who allowed it, and who made it come true.
I’m really thankful to you.

From the @ryugagotoku X account:

I felt a connection with this work due to the deep lyrics that question the meaning of life, so I made the offer.
This was made possible with the kind consent of Ringo Sheena.
Please enjoy Ringo Sheena’s music that colors the story in-game!