Matsui SecuritiesMatsui Securities is a Japanese financial company. It is listed on the Nikkei 225.WWW matsui.co.jp𝕏 Matsui06HistoryAlthough the company was incorporated in, it was a very small company until it changed its business strategy in the mid-1990s to take advantage of online trading and the freedoms afforded by the recent financial company deregulations in Japan. Today its primary business is providing online securities trading services.