Synopsis

After surviving a family coup, Kintoki disguises herself as a man and becomes one of the Four Heavenly Kings, elite warriors defending Heian-era Kyoto from demons, spirits, and whatever else crawls out of the forests at night. That's already a solid premise, but what makes this single OVA worth your time is how it handles the weight behind that setup. This isn't just a demon-slaying action piece. It's a story about loyalty and identity, framed through a woman who can't be herself and a love she carries into every fight. Production I.G made this in 2001, and the art style leans into traditional Japanese ink painting aesthetics. it genuinely looks different from most anime you've seen. The Heian setting feels lived-in rather than decorative, with supernatural folklore woven into the historical backdrop in ways that feel grounded rather than gimmicky. At one episode, it's a quick watch, but it's dense. The tone sits somewhere between melancholic and action-forward, so don't expect a light time. If you've seen Otogi Zoshi and enjoyed how it treats Japanese folklore seriously, this scratches a similar itch. Fans of Rurouni Kenshin: Tsuiokuhen who liked that show's emotional weight wrapped inside sword-fighting will probably find something here worth sitting with. It's not a crowd-pleaser: it's short, stylized, and asks you to meet it halfway. But if that sounds appealing, Kai Doh Maru rewards the attention.