[5] The studio's website, s1s1s1.com, has been online since June 30, 2004[2] and their first videos were released in November 2004 starring AV Idols Sora Aoi and Alice Ogura along with the simultaneous debut of eight new actresses: MEW, Mami Hayasaki, Kaya Yonekura, Chihiro Hara, Kanan Kawai, Akane Mochida, Rin Hino and Misato Shiraishi.

[7] In celebration of its 5th anniversary, S1 organized a special puroresu event with All Japan Pro Wrestling, which was held on January 22, 2010 at Korakuen Hall.

The main bout of the event, named the Akiho Yoshizawa Cup after the popular idol of the studio, featured several prominent wrestlers such as Keiji Mutoh, Masakatsu Funaki, TARU, and Ryota Hama.

[8] S1 began producing videos in Blu-ray format as early as September 2009 with The Raped Female Teacher 2 starring Akiho Yoshizawa.

The release of the 3D videos coincided with the introduction of 3D televisions by Sony and Panasonic and the titles were expected to boost sales of the new TVs.

Mikami's addition to S1 not only skyrocketed S1's popularity in the Japanese market, but also attracted many viewers from outside Japan where a large number of them have even produced subtitles for their movies.