The adenohypophysis of Tokara goats, the Japanese native species, were studied to demonstrate the general structure and the characteristics of each endocrine cells by use of antisera against GH, PRL, ACTH, TSH, FSH and LHβ by lightmicroscopic immunohistochemistry. The adenohypophysis of Tokara goat was characteristic in the Pars intermedia, which extended to the dorsolateral surface of neurohypophysis in part and encircled it. Immunohistochemical investigation showed that GH, PRL and ACTH cells distributed independently, whereas there were some cells that responded to anti-TSH, anti-FSH and anti-LHβ sera simultaneously. The result that anti-FSH and anti-LHβ sera stained same cells agrees the reports by many authors, but as concerns TSH cells, it is supposed that the specificity of anti-TSH serum might be weak. In a castrated male goat, FSH and LHβ cells changed to the hypertrophied “castration cells", which were stained a little paler than those of normal male goat by antisera. TSH, FSH and LHβ cells were also demonstrated in the Pars intermedia, that has not been reported that TSH, FSH or LHβ cells have existed in the Pars intermedia of the adenohypophysis except for Wulzen's cone.