[5] Nagoshi graduated from Tokyo Zokei University with a degree in movie production and joined Sega shortly thereafter, working for the second arcade department (AM2) under Yu Suzuki as a CG designer.

Daytona USA was the first game to use the Sega Model 2 arcade hardware which produced very advanced graphics and was developed jointly with General Electrics, which was located in the US.

The development of Daytona USA brought great responsibility for Nagoshi as he was promoted into leadership positions relatively fast.

Shenmue was the last time he worked with AM2 and Yu Suzuki; he first was a supervisor on the project but was dissatisfied with how the game went and asked for his own development division, which later became Amusement Vision.

However, he was called in by the CEO at the time to get the game finished, and as a result, he had to serve as producer and director on the final months of development.

[8] In 2000, Sega restructured its arcade and console development teams into nine semi-autonomous studios headed by the company's top designers.

The CEO of Sega at the time complained that games became too expensive to make, and Nagoshi told him that they couldn't do it any cheaper.

Amusement Vision and Smilebit had different cultures and strengths, so Nagoshi thought it'd be best for the staff morale to start from scratch and to develop a new IP in the form of Yakuza.

The game had a difficult development cycle, as the first pitch was rejected by the higher-ups, due to expecting something different out of Nagoshi.

Despite Sega executives viewing the game as an unprofitable risk due to its lack of broader appeal, Satomi took an interest in it.

[10] When developing the Yakuza franchise, Nagoshi learned the difference between nurturing one IP and making many types of genres during his time at Sega AM2 and Amusement Vision.

[15][16] In February 2012 it was announced that Nagoshi would be promoted to the role of chief creative officer at Sega of Japan, as well as being appointed to the company's board of directors.

[18] As CCO, Nagoshi keeps being close to the games that his studio at Sega develops and stays up to date on the newest systems and technologies, although that is getting harder for him as he gets older.

[21] In October 2021, it was announced that Nagoshi would be leaving both Sega and Ryu Ga Gotoku Studio along with series director Daisuke Sato.

The series producer and writer Masayoshi Yokoyama would become the new studio head in place of Nagoshi who was in the position since the beginning.

His parents were physically unscathed, though his mother was left mentally scarred to such an extreme extent that she allegedly could not even recognize her own family.

[13] Asked about his personal appearance, fashion style and how it changed over time, Nagoshi says he adapts to what his current girlfriend is into.