[8] Nichii Gakkan was founded in 1968 as a medical office administration services business.

[9] In recent times Nichii Gakkan's stock price has fluctuated substantially.

[26] On August 5, 2011 it was announced that Nichii Gakkan would add to its education business area by purchasing the eikaiwa Gaba Corporation, mostly delivering one-on-one lessons at with 36 locations across Japan, for $127 million[27] and making it a wholly owned subsidiary.

[31][32] In April 2012 Nichii Gakkan founded Coco Juku, an English conversation school primarily focused on group lessons.

[33] Nichii Gakkan has also made the Sydney English Language Centre (SELC Pty Ltd), a subsidiary, and plans to expand its operations into North America and Europe.