In addition to his Star Wars works, he's done illustrations for KOEI PC/Online game series of Nobunaga's Ambition and Romance of the Three Kingdoms, Toho's Godzilla, Mothra and King Ghidorah: Giant Monsters All-out Attack, and covers for Sekai Bunka Publishing Sanguozhi (Three Kingdom Saga).
He is a member of the Society of Illustrators and the Japan Publication Artist League.
Around 1998, artist Tsuyoshi Nagano saw a Star Wars novel at a bookstore and was inspired to ask his employer, Takeshobo, publisher of the Japanese Star Wars novels, if he could do cover art for the novels. Nagano had been a fan of Star Wars since seeing it in school, and the first laserdisc he bought was Star Wars, so he was "really excited" to take on the project. The first job he got was to do the cover art for a Willow novel, and his boss Junzo Takagi was impressed with his work. Afterwards, Nagano was given the go-ahead to create his first Star Wars novel cover art for the Hand of Thrawn duology.
Nagano went on to create 96 pieces of cover art in total for the Star Wars franchise.
- The Phantom Menace
- The Jedi Quest series
- Outbound Flight
- Attack of the Clones
- The Clone Wars multimedia project
- Labyrinth of Evil
- Dark Lord: The Rise of Darth Vader
- The Last of the Jedi series
- Death Star
- Allegiance
- The Hand of Thrawn duology
- Survivor's Quest
- The New Jedi Order series
- The Dark Nest trilogy
- The Essential Chronology
- The New Essential Chronology
- The Ultimate Visual Guide: Special Edition