Leydig cell

Japanese: Leydig cell（英語表記）Leydigcell

…Sperm are produced in the convoluted seminiferous tubules and sent to the epididymis via the straight seminiferous tubules and the rete testis. Between each convoluted tubule is a loose connective tissue called interstitial tissue, which contains blood vessels, nerves, and interstitial cells (Leydig cells). The interstitial cells secrete the male hormone testosterone. …

From [Testicles]

…As the individual matures, the primary spermatocytes enter the maturation phase, reduce their chromosomes by half, and become secondary spermatocytes, which then become spermatids and sperm. This series of processes is driven mainly by male hormones secreted by Leydig cells derived from connective tissue. [Urasaki Hiroshi]. …

From [Endocrine Glands]

In fish, both tissues are called the internephron. (8) Testis Also called the testis, the Leydig cells, or interstitial cells, of the testes of vertebrates secrete male steroid hormones. (9) Ovaries The interstitial cells secrete female steroid hormones.

*Some of the terminology that mentions "Leydig cell" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…曲精細管の中で精子を作り，直精細管，精巣網を経て精巣上体に送る。一方それぞれの曲精細管の間は間質結合組織と呼ばれる疎性結合組織から成り，その中に血管，神経，間細胞(ライディヒ細胞Leydig cell)を含む。間細胞は，男性ホルモンであるテストステロンtestosteronを分泌する。…