| July, 1933 | Company founder Isaburo Takeyasu established Zeniya Aluminum Engineering in Sakai City, Osaka Prefecture, and started manufacturing household aluminum containers and other aluminum products. |
| November, 1948 | Incorporated as Zeniya Aluminum Engineering, Ltd., which was established at 18 Nishisaraike-cho Nishinari-ku, Osaka City with one million yen in capital. |
| October, 1953 | Zeniya expanded its business to the new field of electric equipment manufacturing as the subcontract factory for major home appliance manufacturers. |
| October, 1957 | Jyuso Factory was established in Nishiyodogawa-ku, Osaka City |
| April, 1962 | A stamping factory was established in Ikeda City. |
| April, 1966 | A buoy factory was established in Ikeda City. |
| August, 1972 | Zeni Lite Buoy Co., Ltd. was established. |
| August, 1973 | Zeniya Ocean Service Engineering, Ltd. was established. |
| November, 1973 | The Head Office building was completed in Ikeda City, and head office functions were moved into the new building. |
| July, 1974 | Buoy Consultant Co., Ltd. was established. |
| May, 1978 | Zeniya Aluminum Industry Co., Ltd. was established. |
| December, 1978 | Capital was increased to the current amount of 132 million yen. |
| May, 1981 | The Okayama-Tamashima Factory was opened. |
| December, 1983 | President Isaburo Takeyasu took up the post of Chairman of the board of directors, and Vice-President Kazuo Takeyasu took up the post of President. |
| November, 1988 | The West Stamping Factory was established in Ikeda. |
| December, 1994 | The Jyuso Factory was closed. |
| April, 1995 | Parking and coin-operated car wash facilities were opened at the site of the former Jyuso Factory. |
| April, 1997 | The name of the Buoy Department was changed to Okayama-Tamashima Department. |
| November, 1998 | President Kazuo Takeyasu took up the post of Chairman of the board of directors, and the Vice-President Tadashi Takeyasu took up the post of President. |
| March, 2000 | Head Office/Ikeda Factory acquired ISO9001. |
| January, 2002 | Head Office/Ikeda Factory acquired ISO14001. |
| July, 2003 | Okayama-Tamashima Department acquired ISO9001. |
| December, 2005 | Chairman Kazuo Takeyasu stepped aside, and took up the post of Corporate Advisor. |
| 2008 | The 60th anniversary ceremony was held. A factory began operation in Chang An Town. Dongguan City, China under the license of CODON, which is a Taiwanese company. The CSR Promotion Department was established to manage centrally ISO9001, ISO14001, health and safety, intellectual property, and regulatory compliance issues. |
| 2010 | The Qian Da Wu Jin Zhi Pin Chang was established, and the operations of Factory #1 and #2 began in Chang An. |
