| 1935-12-20 |
昭和10年12月20日: 昭和製袋工業株式会社設立（東京市麻布区） |
| 1935-12-20 |
昭和10年12月20日、昭和製袋工業株式会社設立（東京市麻布区） |
| 1947-03 |
1947 March: Moved headquarters to Nihonbashi Odenma-cho, Chuo-ku, Tokyo. |
| 1947-03 |
Moved headquarters to Nihonbashi Odenma-cho, Chuo-ku, Tokyo. |
| 1953-02 |
1953 February: Established Osaka branch office. |
| 1953-02 |
Established Osaka branch office. |
| 1953-12 |
1953 December: Established Furuoka factory. |
| 1953-12 |
Established Bofu factory. |
| 1957-05 |
1957 May: Established Toyama factory. |
| 1957-05 |
Established Toyama factory. |
| 1962-04 |
1962 April: Signed a technology partnership agreement with United States Centregis Paper Co. (now Smurfitt Stone Container Co.). |
| 1962-04 |
Signed a technology partnership agreement with United States Centregis Paper Co. (now Smurfitt Stone Container Co.). |
| 1962-05 |
1962 May: Established Kameyama factory. |
| 1962-05 |
New Kameyama Factory Established |
| 1964-10 |
1964 October: Established polyethylene heavy bag factory at Furuoka factory. |
| 1964-10 |
New Polyethylene Heavy Bag Factory Established at Fukuoka Factory |
| 1965-11 |
1965 November: Moved headquarters to Machimotomura-cho, Shinjuku-ku, Tokyo. |
| 1965-11 |
Headquarters Relocated to Ichiyamomura-cho, Shinjuku-ku, Tokyo |
| 1966-05 |
1966 May: Absorbed and merged with Taiyo Paper Co., Ltd. |
| 1966-05 |
Absorbed and Merged with Taiyo Paper Co., Ltd. |
| 1967-03 |
New Tokyo Factory Established |
| 1968-03 |
1968 March: Established Tokyo factory. |
| 1968-12 |
Established Shinwa Chemical Industries Co., Ltd., Commenced Production and Sale of Resin Products |
| 1969-12 |
1969 December: Established Shinwa Chemical Industries Co., Ltd., and began manufacturing and selling resin products. |
| 1970-11 |
1970 November: Capital of 400 million yen. |
| 1970-11 |
Capital of 400 million yen |
| 1973-01 |
1973 January: Took a capital stake in Kyushu Paper Co., Ltd. |
| 1973-01 |
Capital Participation in Kyushu Paper Co., Ltd. |
| 1979-03 |
1979 March: Took a capital stake in San'ei Chemical Industries Co., Ltd. and Kaken Industrial Co., Ltd. (now San'ei Kaken Co., Ltd.). |
| 1979-03 |
Capital Participation in San-E Chemical Industries Co., Ltd. and Kaken Chemical Industries Co., Ltd. (now San-E Kaken Co., Ltd.) |
| 1981-04 |
Showa 56 (1981) : April : Established NESCO Co., Ltd. |
| 1981-04 |
Established NESCO Co., Ltd. |
| 1989-04 |
Heisei 1 (1989) : April : Absorbed and merged with Shinwa Chemical Industries Co., Ltd. |
| 1989-04 |
Absorbed and Merged with Shinwa Chemical Industries Co., Ltd. |
| 1989-12 |
Heisei 1 (1989) : December : Renamed to Showa PAX Co., Ltd. |
| 1989-12 |
Renamed to Showa PAX Co., Ltd. |
| 1990-10 |
Heisei 2 (1990) : October : Constructed a warehouse at Tokyo factory and entered rental business. |
| 1990-10 |
Constructed a Rental Warehouse at Tokyo Factory and Entered Rental Business |
| 1994-07 |
Heisei 6 (1994) : July : Completed new headquarters building, PAX Building. |
| 1994-07 |
Completion of New Headquarters Building, PAX Building |
| 1996-03 |
Heisei 8 (1996) : March : Capital 520.5 million yen. |
| 1996-03 |
Capital of 520.5 million yen |
| 1997 |
Heisei 9 (1997) : Established Thai Showa PAX Co., Ltd. |
| 1997-04 |
Heisei 9 (1997) : April : Established Thai Showa PAX Co., Ltd. in Thailand (manufacturing and selling kraft paper bags). |
| 1997-04 |
Established Thai Showa PAX Co., Ltd. in Thailand (Manufacturing and Selling Kraft Paper Bags) |
| 1998 |
Heisei 10 (1998) : Commenced operations. |
| 1998 |
Started operations of Taishō Paks Co., Ltd. in Thailand in 1998 |
| 1999-04 |
Heisei 11 (1999) : April : IPO (listed on JASDAQ) Capital 640.5 million yen. |
| 2001-04 |
Public Offering (JASDAQ Listing) with Capital of 640.5 million yen |
| 2003-01 |
Heisei 15 (2003) : January : Thai Showa PAX Co., Ltd. obtained ISO 9001 certification. |
| 2003-01 |
Thai Showa PAX Co., Ltd. Obtained ISO9001 Certification |
| 2004-12 |
Heisei 16 (2004) : December : Cancelled floor registration with Japan Securities Association and listed shares on JASDAQ. |
| 2004-12 |
Cancelled Floor Registration with Japan Securities Association and Listed Shares on JASDAQ Securities Exchange |
| 2007-01 |
Heisei 19 (2007) : January : Kakegawa factory film division obtained ISO 9001 certification (resulting in all company factories and divisions obtaining ISO 9001). |
| 2007-01 |
Kakegawa Factory Film Division Obtained ISO9001 Certification (Resulting in All Divisions of All Factories Achieving ISO9001) |
| 2007-03 |
Heisei 19 (2007) : March : Tokyo factory obtained ISO 14001 certification. |
| 2007-03 |
Tokyo plant obtains ISO14001 certification |
| 2009-12 |
Heisei 21 (2009) : December : Made San'in Pack Ltd. and San'in Seibukou Industries Co., Ltd. subsidiaries. |
| 2009-12 |
Yamashin Pack Co., Ltd. and Yamashin Seibukou Industry Co., Ltd. become subsidiaries |
