Arms Corp., Ltd. (Japanese: 有限会社アームス, Hepburn: Yūgen-gaisha Āmusu, stylized as ARMS) was a Japanese animation studio based in Suginami, Tokyo and active from 1996 to 2020.

After the merger, the studio continued to credit some of its work under the old names Dandelion (ダンディライオン, Dandiraion) and Triple X (トリプルX, Toripuru Ekkusu) until 2002, and did some minor work under the name Garyū Studio in the early 2000s.

The animator and character designer Rin Shin is the chief animation director for several productions by Arms which tend to have an above-average amount of fan service, for example the Ikki Tousen and Queen's Blade series.

After its founding, ARMS was, at first, a producer of hentai (most notably its productions with Green Bunny), but ceased productions of erotica in the mid-2000s with the growing popularity of their televised works.

[2] On May 31, 2020, Common Sense decided dissolving the company following a shareholder meeting, with Tokyo district court accepting notice of liquidation filed in July 22, 2020.