At first, this Article provides the outline of the Japanese Companies Act (Kaisha-hou), which enacted in 2005. This Act does not require minimum start-up capital for a stock company (Kabushikigaisha). For example a stock company can be incorporated by one founder (Hokkinin) with a minimum start-up capital amount of one Yen. Concerning the establishment of the organs other than shareholders meeting, a stock company must have one or more directors (Torishimariyaku) as the minimum requirement of organs (Art.326(1)). With some exceptions of Article 327(1)(public company (Kokai gaisha), etc.)・328 (large sized company (dai gaisha)), a stock company may have a board of directors(Torishimariyaku kai), an accounting advisor (Kaikeisanyo), a company auditor (Kansayaku) , a board of company auditors (Kansayaku kai) , a financial auditor (Kaikeikansanin), etc. as prescribed by the articles of incorporation (Art.326(2)). About 10 years after the enactment of the Japanese Companies Act, the first Reform Bill was passed in 2014. This Bill had the content of new regulations relating to the system of audit and supervisory committee (Kabsatou iinkai) (Art.339-2~14), cash-out (Art.179), a multiple derivative action(Art.847-3) and etc. Finally, the author treats of the ongoing Reform Bill under discussion in early December 2019, which includes several regulations relating to the corporate governance. According to this Bill, a large sized public company with a board of company auditors, which is required to submit an Annual Report, has obligation to establish an outside director (Shagai torisimariyaku) (Art.327-2).