The studio was formed on November 18, 1996 as a split from
Studio Kikan to operate the company's
hentai brands. Studio Kikan was already producing hentai under its own name and the pseudonyms
Triple X and
Dandelion. When Arms was founded, the company took over all hentai-oriented works but continued using the Triple X and Dandelion brand names, as well as creating its own Garyuu Studio, until about 2002. 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. She also developed the character designs for I"s Pure''. 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.
Common Sense era The company officially changed its name from Arms to Common Sense (株式会社コモンセンス) in August 31, 2017, but maintained the Arms label as a trade name. ==Productions==