2012 is the 24nd year of the reign of the current emperor of Japan, so Heisei 22 is 2010. Which is where Satoshi Itasaka and Takuto Usami took the name for their Tokyo-based design firm, h220440.
The EVA Kids Chair, meanwhile, debuted on h230521. I worry that it started to get a little loose and floppy on h230524, and that by h230531, some kid had torn one of those legs off.
EVA Chair for Kids [h220430.jp via designmilk]
