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| 1949.12 | Tokyo dampproofing industry was established in Ota-ku, Tokyo（Our founding） |
|---|---|
| 1959.10 | Company is reorganized and changed to Company named "Tokyo dampproofing foil, Co., Ltd."（Established our company） |
| 1972.10 | By 100% financing of Showa Aluminum Company, "Tokyo moisture-proof foil" became "Showa Laminating Industry Co., Ltd." and moved to Isehara, Kanagawa. |
| 1990.12 | Taisei Polymer Co., Ltd. merged with Hinode Kogyo Co., Ltd. and established Heisei Polymer Co.,Ltd. |
| 1992.4 | Heisei Polymer Co., Ltd.'s Sakai Plant is moved to Nara Plant |
| 2001.3 | Showa Aluminum Company merged with Showa Denko K.K. and became Showa Denko K.K. |
| 2001.10 | Showa Denko unified "Showa Laminating Industry Co.,Ltd." and two sections* of Showa Denko group below, then established Showa Denko Packaging Co.,Ltd.". *converting foil division of Showa Denko *laminate division of Heisei Polymer |
| 2003.8 | Nara Plant, Sakai Plant are gathered to Hikone Plant |
| 2021.6 | Tokyo Branch is moved to Isehara Head Office |
| 2022.10 | Production functions of the Isehara Plant are gathered to Hikone Plant |
| 2023.1 | Notification on the change Resonac Packaging Corporation |
