| 2005-01 |
In January 2005, Japan Paper Industries Co., Ltd. (the surviving company, now Dynapack Corporation) transferred all sales related to production through a split-off method to Dai Nippon Paper Industries Preparation Co., Ltd., and Japan Hyperpack Co., Ltd. (dissolved company) succeeded all sales related to production through the same method, merging and changing the company name to Dynapack Corporation. |
| 2005-01 |
January 2005: Japan Paper Industry Co., Ltd. (surviving company, now DynaPack Co., Ltd.) transferred all sales related to production to Dai Nippon Paper Industry Preparation Co., Ltd. through a split-off method, and Japan Hyper Pack Co., Ltd. (dissolved company) transferred all sales related to production to Japan Hyper Pack Preparation Co., Ltd. through the same method, and merged, changing the company name to DynaPack Co., Ltd. |
| 2005-07 |
In July 2005, the management integration of Dai Nippon Paper Industries Toki Factory and Union Pack Co., Ltd. headquarters factory was completed (now Toki Dynapack Co., Ltd., a current consolidated subsidiary). |
| 2005-07 |
In July 2005, Aibao Packaging Products Trading (Shenzhen) Co., Ltd. was established in Shenzhen, Guangdong Province, China (now Tainer Packaging Products Trading (Shenzhen) Co., Ltd., a current consolidated subsidiary). |
| 2005-07 |
July 2005: Management integration of Dai Nippon Paper Industry Toki Factory and Union Pack Co., Ltd. headquarters factory (now Toki DynaPack Co., Ltd., current consolidated subsidiary). |
| 2005-07 |
July 2005: Established AiPak Packaging Products Trading (Shenzhen) Co., Ltd. in Shenzhen, Guangdong Province, China (now Tainer Packaging Products Trading (Shenzhen) Co., Ltd., current consolidated subsidiary). |
| 2005-11 |
In November 2005, a sales office of Suzhou Sun Packaging Co., Ltd. was opened in Hangzhou, Zhejiang Province, China. |
| 2005-11 |
November 2005: Opened the Hangzhou sales office of Suzhou Sun Packaging Co., Ltd. in Hangzhou, Zhejiang Province, China. |
| 2006-05 |
In May 2006, invested in NEW TOYO DYNAPAC CO., LTD. in Vietnam. |
| 2006-05 |
May 2006: Invested in NEW TOYO DYNAPAC CO., LTD. in Vietnam. |
| 2007-12 |
In December 2007, 100% subsidiary of NEW TOYO DYNAPAC CO., LTD., renamed Dynapac (Hanoi) Co., Ltd. (a current consolidated subsidiary). |
| 2007-12 |
December 2007: Made NEW TOYO DYNAPAC CO., LTD. a 100% subsidiary and renamed it Dynapac (Hanoi) Co., Ltd. (current consolidated subsidiary). |
| 2009-05 |
In May 2009, Miyo-shi, Aichi Prefecture, established Miyo-shi Business Office. |
| 2009-05 |
May 2009: Established Miyoshi Business Office in Miyoshi City, Aichi Prefecture. |
| 2009-07 |
In July 2009, Sun Packaging Co., Ltd. and Pax Aichi Co., Ltd. merged and changed the company name to Tajimi Dynapack Co., Ltd. (a current consolidated subsidiary). |
| 2009-07 |
July 2009: Merged San Package Co., Ltd. and Pax Aichi Co., Ltd., and changed the company name to Tajimi DynaPack Co., Ltd. (current consolidated subsidiary). |
| 2010-07 |
In July 2010, Dai Nippon Paper Industries Co., Ltd., Japan Hyperpack Co., Ltd., East Japan Hyperpack Co., Ltd., and New Japan Hyperpack Co., Ltd. were absorbed and merged. |
| 2010-07 |
July 2010: Absorbed and merged Dai Nippon Paper Industry Co., Ltd., Japan Hyper Pack Co., Ltd., East Japan Hyper Pack Co., Ltd., and New Japan Hyper Pack Co., Ltd. |
| 2010-10 |
In October 2010, Yamagata Hyperpack Co., Ltd. was absorbed into Fukushima Business Office. |
| 2010-10 |
October 2010: Absorbed and merged Yamagata Hyper Pack Co., Ltd. into Fukushima Business Office. |
| 2014-06 |
In June 2014, DYNAPAC PACKAGING TECHNOLOGY (PHILIPPINES) INC. was established in the Philippines (a current consolidated subsidiary). |
| 2014-06 |
June 2014: Established DYNAPAC PACKAGING TECHNOLOGY (PHILIPPINES) INC. in the Philippines (current consolidated subsidiary). |
| 2014-08 |
In August 2014, DYNAPAC (HAIPHONG) CO., LTD. was established in Vietnam (a current consolidated subsidiary). |
| 2014-08 |
August 2014: Established DYNAPAC (HAIPHONG) CO., LTD. in Haiphong, Vietnam (current consolidated subsidiary). |
| 2016-07 |
In July 2016, acquired shares of Crown Paper Industry Co., Ltd. (a current consolidated subsidiary) and made it a subsidiary. |
| 2016-07 |
July 2016: Acquired shares of Crown Paper Industry Co., Ltd. (current consolidated subsidiary). |
| 2018-07 |
In July 2018, acquired shares of Asahi Cardboard Co., Ltd. (a current consolidated subsidiary) and made it a subsidiary. |
| 2018-07 |
July 2018: Acquired shares of Asahi Danboru Co., Ltd. (current consolidated subsidiary). |
| 2019-04 |
In April 2019, acquired shares of GRAND FORTUNE CORPORATION SDN. BHD. (now DYNAPAC GF (MALAYSIA) SDN. BHD., a current consolidated subsidiary). |
| 2019-04 |
April 2019: Acquired shares of GRAND FORTUNE CORPORATION SDN. BHD. (now DYNAPAC GF (MALAYSIA) SDN. BHD., current consolidated subsidiary). |
| 2020-01 |
In January 2020, acquired shares of Ogura Paper Co., Ltd. (now Suruga Dynapack Co., Ltd., a current consolidated subsidiary). |
| 2020-01 |
January 2020: Acquired shares of Ogura Paper Co., Ltd. (now Suruga DynaPack Co., Ltd., current consolidated subsidiary). |
| 2022-01 |
In January 2022, acquired shares of Joso Co., Ltd. and Joso Pack Co., Ltd., making them subsidiaries. |
| 2022-01 |
January 2022: Acquired shares of Jo-sei Co., Ltd. and Jo-sei Pack Co., Ltd., and made them subsidiaries. |
| 2024-03 |
In March 2024, acquired shares of Vietnam TKT Plastic Packaging Joint Stock Company, making it a subsidiary. |
| 2024-03 |
March 2024: Acquired shares of Vietnam TKT Plastic Packaging Joint Stock Company and made it a subsidiary |
| 2024-07 |
July 2024: Jo-sei Pack Co., Ltd. was absorbed into Asahi Danboru Co., Ltd. |
| 2024-07 |
July 2024: Absorbed and merged Jōsai Pack Co., Ltd. into Asahi Danboru Co., Ltd. |
| 2025-08 |
August 2025: Acquired shares of Hoang Hai Vietnam Packaging Joint Stock Company and made it a subsidiary. |
| 2025-08 |
August 2025: Acquired shares of Hoang Hai Vietnam Packaging Joint Stock Company and made it a subsidiary |
| 2025-11 |
November 2025: Acquired shares of Marunaka Paper Industry Co., Ltd. and made it a subsidiary. |
| 2025-11 |
November 2025: Acquired shares of Marunaka Paper Industry Co., Ltd. and made it a subsidiary |
