Ganbare Goemon Gaiden: Kieta Ōgon Kiseru (がんばれゴエモン外伝 きえた黄金キセル?, "Ganbare Goemon Gaiden: The Gold Pipe Which Went Off") is a video game in the Ganbare Goemon series, released for the Family Computer on January 5, 1990 in Japan.
While Goemon is praying to his ancestors, he notices that his pipe is gone. Aided by Ebisumaru, Goemon goes to find it. This game introduced many characters that appeared later in the series, such as Yae. It is the first Goemon Role-playing game, and the third Goemon game to appear on a Nintendo system.
Source: Wikipedia, "Ganbare Goemon Gaiden: Kieta Ōgon Kiseru", available under the CC-BY-SA License.