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| 1915 | April | The Founder, Chuji Koshiro started working as an apprentice for a medicine wholesaler Ozaki Yakichi Shoten located at Doshomachi 1-chome 14, Higashi-ku, Osaka City. |
| 1918 | April | Chuiji Koshiro promoted to the head clerk and started exploring the industrial chemicals market. |
| 1925 | April | Started importing and distributing petrolatum produced by Pennsylvania Refining Company, a US company which is currently known as Calumet Refining, LLC. |
| 1930 | August 1 |
Chuji Koshiro allowed by Ozaki Yakichi Shoten to be independent at the age of 30. Koshiro Chuji Shoten, a trading company dealing with medicines, founded at Kokumachi 1-chome 20, Higashi-ku, Osaka City. Started sales of raw materials for medicines and cosmetics and the production of beeswax. |
| 1932 | November 5 | An office established at 2-chome 33 of Doshomachi which is a historical medicine quarter in Osaka. |
| 1938 | Beeswax production facility newly established at Toyonaka Plant. | |
| 1946 | January 1 | Made a fresh start at Doshomachi 2-chome 26 for the postwar reconstruction. |
| 1947 | March 25 | C. Koshiro & Co., Ltd. incorporated. Chuji Koshiro became the president of the company. |
| 1949 | December | Osaka Plant established at Tokui-cho 2-chome 56, Higashi-ku, Osaka City. Started the production of menthol. |
| 1955 | June | Refining and bleaching facilities for beeswax newly established. |
| 1955 | August 28 |
 
The head office was moved to the current location of Doshomachi, 3-chome 5, Higashi-ku, Osaka City.
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| 1957 | July 2 - August 24 | The business trip around the world by the Founder Chuji Koshiro to the USA, the UK, Germany, France, Iran, India, Pakistan, Hong Kong and Taiwan |
| 1957 | October 15 | Took part in the second China Import and Export Fair (the Canton Fair) as one of the first Japanese companies. |
| 1962 | December |
 
Mino Plant established at Ina 1141, Mino City, Osaka Prefecture. Started the extraction business of natural plants.
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| 1968 | April 30 |
The R&D Building constructed in Mino Plant.
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| 1976 | June | The spray drying facility introduced in Mino Plant. |
| 1978 | December 18 | Chuichi Koshiro named as president of the company. |
| 1982 | May 7 |
Kameoka Plant established at Wakamiyasuji 57, Namikawa, Oicho, Kameoka City, Kyoto Prefecture. The menthol facility transferred from Osaka to Kameoka.
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| 1982 | August 15 | Extraction facilities newly established at Kameoma Plant. Started the extraction business of natural plants. |
| 1983 | May | The facilities for refining and bleaching beeswax transferred from Mino Plant to Kameoka Plant. |
| 1985 | July 1 |
The 55th anniversary of the founding of the company.
The company name changed to Koshiro Company Limited.
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| 1987 | May 31 |
The R&D Building constructed in Kameoka Plant. The R&D function transferred from Mino Plant.
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| 1989 | February 13 | Higashi-ku and Minami-ku of Osaka City were merged, and the address of headquarters was changed to Doshomachi 2-5-8, Chuo-ku, Osaka City. |
| 1989 | December 7 | Completed the 1st pharmaceutical production facility in Kameoka. |
| 1990 | Augst 1 |
Celebrated the 60th anniversary of the founding of the company.
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| 1991 | December 21 | Completed the employees building in Kameoka Plant. |
| 1992 | December 25 |
Opened the Midosuji Boulevard and the Central Eastern Boulevard which serve as Kameoka Plant's main streets.
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| 1994 | February 21 | Completed the raw material warehouse in Kameoka Plant. |
| 1998 | November 30 | Completed the 2nd pharmaceutical production facility in Kameoka. |
| 2000 | May 23 |
Completed the finished product warehouse in Kameoka Plant.
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| 2000 | August 26 |
Cerebrated the 70th anniversary of the founding of the company.
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| 2001 | January 1 | Tadaaki Koshiro named president of the company. |
| 2001 | January 15 |
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Completed the 1st extraction facility and the beeswax production facility in Kameoka.
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| 2005 | June 25 | Completed the 2nd extraction facility in Kameoka Plant. |
| 2005 | August 1 |
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The 75th anniversary of the founding of the company.
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| 2007 | May 7 |
Held a cerebration party in commemoration of the 25th anniversary of the establishment of Kameoka Plant.
Announced the 2nd master plan.
Completed the entrance of Kameoka Plant.
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| 2008 | April 8 |
The 25th anniversary of the establishment of Kameoka Plant.
Planted a metasequoia.
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| 2008 | May 30 |
Completed the reception building and the 1st and 2nd raw material warehouses.
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| 2010 | April 8 |
The dream of the founder of the extraction business:
Further Growth Cherry tree planting
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| 2010 | May | Completed the second phase construction of the 2nd extraction facility. |
| 2010 | August 1 |
The 80th anniversary of the founding of the company.
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| 2012 | February 26 |
Completed the 5th extraction facility.
A ginko tree planted in commemoration of the 50th anniversary of the extraction business.
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| 2012 | May 7 |
The 50th anniversary of the extraction business.
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| 2013 | April 8 |
The 30th anniversary of the establishment of Kameoka Plant.
Planting ceremony of One Thousand Pine Trees at the Toshitani River in Shino-cho, Kameoka City.
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| 2013 | May |
Completed the second phase construction of the 1st extraction facility.
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| 2013 | September |
Completed the third phase construction of the 2nd extraction facility.
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| 2015 | April 1 |
The 100th anniversary of the Founder Chuji Koshiro’s Apprenticeship in Osaka. 100 to 100 First Stage 2015 - 2030 2015-2020 |
| 2015 | May 18 |
Donated inflatable arches to Kameoka City for Kameoka Half Marathon.The 60th anniversary of the municipality of Kameoka City The 60th anniversary of the relocation of headquarters |
| 2015 | July 1 |
The 30th anniversary of the current company name.
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| 2015 | August 1 | The 85th anniversary of the founding of the company. |
| 2015 | August 7 |
The 64th Kameoka Peace Festival Hozu River Fireworks Display.
The number of fireworks launched: 5,000 pieces.
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| 2017 | March 25 |
The 70th anniversary of the incorporation of Koshiro Company Limited.
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| 2017 | March |
Completed the 3rd phase construction of the 1st extraction facility.
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| 2017 | March 26 |
Completion ceremony of the 2nd phase construction of the R&D Building.
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| 2017 | May |
Completed the 2nd phase construction of the 5th extraction facility.
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| 2017 |
June 1 (May 7 by lunar calendar) |
Plant tour held in commemoration of the 35th anniversary of the establishment of Kameoka Plant.
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| 2017 | June 30 |
Completed the headquarters' gate and stone pavement which were constructed in commemoration of the 70th anniversary of the company’s incorporation.
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| 2017 | December 21 |
The 35th anniversary of the establishment of Kameoka Plant.
Held a planting ceremony of metasequoia trees in Shino-cho, Kameoka City.
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| 2018 | February 26 |
The 1st phase construction of the 1st stage in Kameoka Plant.
Introduction of city gas to Kameoka Plant.
Completion of the conversion of the energy source.
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| 2018 | August 1 |
The 88th anniversary of the founding of the company.The 2nd phase construction of the 1st stage in Kameoka Plant. Held a ground breaking ceremony for the redevelopment of the north western area. |
| 2019 | January 17 |
Completed Logistics Base and Dangerous Object Warehouses.
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| 2019 | April 8 |
The 3rd phase construction of the 1st stage in Kameoka Plant.
Held a ground breaking ceremony for the redevelopment of Midosuji Boulevard.
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| 2020 | February 22 |
The environmentally friendly administration building introducing geothermal hybrid air-conditioning system and a green roof. Completed the 2nd spray drying facility.
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| 2020 | April 8 |
The full opening of the Central Main Street.
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| 2020 | Augst 1 |
Celebrated the 90th anniversary of the founding of the company.
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May the natural blessing be with you - For your smiley and healthy life. |
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