Sacnoth Inc., renamed Nautilus Inc. in 2002, was a Japanese video game developer based in Tokyo. The company was founded in April 1997 by Hiroki Kikuta with funding from SNK; its staff, including Kikuta, were veterans of Square. While their first releases were the Dive Alert games for the Neo Geo Pocket Color (NGPC), the company was founded to produce Koudelka, a role-playing video game for the PlayStation. The development of Koudelka was troubled due to creative differences between Kikuta and the rest of the staff, with Kikuta resigning as CEO following the game's release and being replaced by Jun Mihara. The company also released the NGPC game Faselei!.

Hiroki Kikuta is a Japanese composer and game designer. His major works are Secret of Mana, Trials of Mana, Soukaigi, and Koudelka, for which he also acted as producer and concept designer. He has composed music for seven other games, and worked as a concept designer in addition to composer for the unreleased MMORPG Chou Bukyo Taisen. He became interested in music at an early age, but earned a degree in Religious Studies, Philosophy, and Cultural Anthropology from Kansai University. He spent the next few years working first as a manga illustrator, then as a composer for anime series, before coming to work for Square in 1991.