This part is a kind of semiconductor called 2SJ122.
Function of this product has Silicon P-Channel MOS FET.
Manufacturers : Hitachi
Image and pinout :

Some of the text within the PDF file :
Free Datasheet http://www.Datasheet-PDF.com/ Free Datasheet http://www.Datasheet-PDF.com/ Free Datasheet http://www.Datasheet-PDF.com/ [ ... ]
2SJ122 PDF Datasheet Download
