Here's What We Know About SARAZANMAI - Anime News Network
Strange Creatures From Japanese Folklore - MyAnimeList.net
Crunchyroll - FEATURE: Monster Mondays - The Kappa
Kappa Characters | Anime-Planet
Gaijin Goombah - 外人グーンバ on Twitter: "Today on Yokai Watchers, we're looking into the Kappa and Kawauso of Sarazanmai to see if their folklore origins can shed some light on the story
Kappa”: The Terror of Japan's Rivers | Nippon.com
Kappa (folklore) - Wikipedia
Kappa Characters | Anime-Planet
Crunchyroll - FEATURE: Monster Mondays - The Kappa