日本沼虾的雄性生殖系统由精巢、输精管、端壶腹和雄性生殖孔组成。精巢外被一层结统组织膜，内为许多生植小管，小管壁包括生精上皮和管壁上皮，生精上皮不断向管腔内增殖，形成不同发育阶段的雄性生殖细胞，输精管分为前输精管（细段）、中输精管（螺旋段）和后输精管（直段），其管壁均由高柱状上皮和矮柱状上皮构成，具有分泌功能；端壶胞壁肌肉层厚，其它结构与输精管壁相仿。精巢的发育季节性明显。 Japanese marsh shrimp male reproductive system by the testis, vas deferens, end ampulla and male reproductive pores. Nest outside the testes is a layer of conventional tissue membrane, which is a small number of micro-tubes for growth, the wall of the small tube, including the seminiferous epithelium and wall epithelial cells, the seminiferous epithelium continue to proliferate into the lumen, the formation of male germ cells at different stages of development, vas deferens For the pre-vas deferens (fine segment), in the vas deferens (spiral segment) and the posterior vas deferens (straight segment), the walls are composed of high columnar epithelium and short columnar epithelium, with secretory function; end pot cell wall muscular layer thickness, other structures Similar to the vas deferens wall. The development of testis significantly seasonal.