Adam Noshimuri, portrayed by Ian Anthony Dale, left the task force after a series of personal challenges and moral dilemmas. He later returned in a recurring capacity.
Adam Noshimuri’s character underwent significant development throughout his time on “Hawaii Five-0.” Initially introduced in Season 2 as the son of a Yakuza boss, Adam eventually becomes a trusted ally and even a love interest for Kono Kalakaua, one of the main characters. Their relationship faces numerous obstacles, including Adam’s ties to his criminal family and his efforts to reform.
Despite his attempts to distance himself from his past, Adam’s Yakuza connections continue to haunt him, leading to various conflicts and challenges. He joins the Five-0 task force officially in Season 7, providing his expertise on organized crime. However, his journey is marred by personal struggles, including the disappearance of Kono, who leaves to fight sex trafficking on the mainland.
Adam’s storyline reaches a turning point when he kills his half-sister, Noriko, in self-defense, and this act sets off a chain of events that ultimately lead to his departure from the task force. He grapples with guilt and the moral implications of his actions, which culminate in his decision to leave the team in Season 10. However, Adam doesn’t exit the series entirely; he returns in a recurring role, assisting the team on various cases while continuing to confront the complexities of his past and his ongoing quest for redemption.