Naoki Hanzawa (Japanese: 半沢直樹, Hepburn: Hanzawa Naoki) is a 2013 and 2020 Japanese television series by Japanese broadcaster TBS based on the Hanzawa Naoki series of novels by Jun Ikeido. It follows the story of Naoki Hanzawa, a banker working for the largest bank in Japan, Tokyo Chuo Bank. He faces numerous obstacles from upper management as he climbs his way up the ranks. The show explores the toxic workplace culture in Japan in term of scapegoating; bullying and unfair seniority within the company's hierarchy. The show received consistently high ratings: the final episode of Season 1 reached 42.2% of viewers in the Kanto area, the highest figure for a drama in the Heisei Era.

The show's popularity in viewer polls achieved the highest rating in three decades of Japanese television drama.

Following its success as the most-watched series in Japan, Hanzawa Naoki made was broadcast overseas in Taiwan and Hong Kong, as well as Jamaica and the Marshall Islands. It was also distributed by Japan Foundation in some Latin American countries such as Mexico and Paraguay, dubbed in Spanish. In Brazil, the series are dubbed in Portuguese and aired via Band TV starts 19 January 2024.

A second season was announced in 2019, scheduled for the spring of 2020. Due to the 2019–20 coronavirus pandemic, the series broadcast and filming was postponed. The second season premiered in Japan in July 2020 and consisted of 10 episodes.