Novels:
* The Confessions of a Yakuza (ヤクザの告白) (2003) - This novel follows the story of a Yakuza member who falls in love with a woman from a different world. It was adapted into a popular film in 2007.
* Love & Lies (恋愛と嘘) (2014) - This novel explores a future where the government assigns marriage partners to citizens at the age of 16. It was adapted into a popular anime series in 2017.
* The Perfect Match (完璧なカップル) (2017) - This novel explores the theme of finding the perfect partner and the complexities of relationships in modern society.
* The Woman Who Loved Me Too Much (僕を愛しすぎた女) (2018) - This novel delves into the themes of obsession and the consequences of unrequited love.
* The Girl Who Stole My Heart (僕の心を盗んだ少女) (2020) - This novel explores the story of a young man who falls in love with a mysterious girl.
Short Stories:
* Nagasawa has also written numerous short stories that have been published in various literary magazines.
Film Adaptations:
* The Confessions of a Yakuza (2007)
* Love & Lies (2017)
Awards:
* Nagasawa has received several awards for his writing, including the Naoki Prize, one of Japan's most prestigious literary awards.
You can find more information about Taiji Nagasawa and his works on his official website and on websites like Goodreads and Amazon.