Yakuza 0

This achievement can be done after you've unlocked the Kiryu's real estate minigame near the end of chapter 5.

This is a guide from psnprofiles.

You're able to purchase properties via Kiryu's Real Estate Royale minigame. The most expensive property is called 'Disco City Boy' which costs ¥1,228,800,000. It's located in the Media King Area, accessed after defeating four of the Five Billionaires. Refer to Silver We Built This City for its exact location and details of how to progress in the Real Estate Royale storyline.

The earliest that you can earn this achievement is in Chapter 6, after you have defeated the Leisure King, the Electronics King, the Pleasure King, and the Gambling King. You can defeat three kings in Chapter 5, but you do not get the opportunity to confront the Gambling King until Chapter 6. You can take over the Gambling King area 100% in Chapter 5, but you will not receive his challenge (for 10% control) until Chapter 6 after the Cat Fight arena opens up to you.

After you have defeated the aforementioned four kings, the Media King's area opens up to Real Estate Royale. The property in question is in the north-center of the map, and has a large neon sign above the entrance. It costs over a billion yen. Once you purchase the property, the achievement will unlock.