Studio Signpost (株式会社スタジオ サインポスト) is an animation studio subsidiary of Pierrot.

The company was founded in 1959 as an advertising agency by Kusano Keiji and stepped into the anime industry in 1989. In 1993, the company took on the name Studio Kikan and released their first animated works Shima Shima Tora no Shimajirou. In 1996, the company established Arms as a separate studio to focus on adult animation and subcontracted animation work.

The studio became a subsidiary of Pierrot in 2008 and changed its name to Pierrot Plus in 2009. Kusano stepping down as CEO to become a chairman, and was replaced by CEO of Arms, Shimizu Osamu.

On September 20, 2019, the company changed its name to Studio Signpost. Hagino Ken, who had worked at Pierrot as animation producer was appointed as the new CEO. In conjunction with this change, the official website of Arms was closed down, and the company was later dissolved on October 6, 2020.
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