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1900 December 21 The Founder, Chuji Koshiro born in Ikaruga no Sato in Nara as the second son of his father Chuzo and mother Kogiku.
1915 April Chuji Koshiro graduated from Ikaruga Higher Elementary School and 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.
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.
1968 April 30 The R&D Building constructed in Mino Plant.
1976 June 18 The spray drying facility introduced in Mino Plant.
1978 December 18 Chuichi Koshiro named 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.
1982 August 15 Extraction facilities newly established at Kameoka Plant. Started the extraction business of natural plants at Kameoka Plant.
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.
1987 May 31 The R&D Building constructed in Kameoka Plant. The R&D function transferred from Mino Plant.
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.
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.
1994 February 21 Completed the Raw Material Warehouse in Kameoka Plant.
1998 November 30 Completed the 2nd Pharmaceutical Production Facility in Kameoka Plant.
2000 May 23 Completed the finished product warehouse in Kameoka Plant.
2000 August 26 Cerebrated the 70th anniversary of the founding of the company.
2001 January 1 Tadaaki Koshiro named president of the company.
2001 January 15 Completed the 1st Extraction Facility and the Beeswax Production Facility in Kameoka Plant.
2001 February 9 Completed the 1st Spray Drying Facility in Kameoka Plant.
2005 June 25 Completed the 2nd Extraction Facility in Kameoka Plant.
2005 August 1 The 75th anniversary of the founding of the company.
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.
2008 April 8 The 25th anniversary of the establishment of Kameoka Plant. Planted a metasequoia.
2008 May 30 Completed the Reception building and the 1st and 2nd Raw Material Warehouses.
2010 April 8 The Dream of the Founder of the Extraction Business: Further Growth Cherry tree planting
2010 May Completed the second phase construction of the 2nd Extraction Facility.
2010 August 1 The 80th anniversary of the founding of the company.
2012 February 26 Completed the 5th extraction facility. A ginko tree planted in commemoration of the 50th anniversary of the extraction business.
2012 May 7 The 50th anniversary of the extraction business.
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.
2013 May Completed the second phase construction of the 1st extraction facility.
2013 September Completed the 3rd phase construction of the 2nd Extraction Facility.
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.
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.
2017 March 25 The 70th anniversary of the incorporation of Koshiro Company Limited.
2017 March Completed the 3rd phase construction of the 1st Extraction Facility.
2017 March 26 Completion ceremony of the 2nd phase construction of the R&D Building.
2017 May Completed the 2nd phase construction of the 5th Extraction Facility.
2017 June 1
(May 7 by lunar calendar) 		Plant tour held in commemoration of the 35th anniversary of the establishment of Kameoka Plant.
2017 June 30 Completed the headquarters' gate and stone pavement which were constructed in commemoration of the 70th anniversary of the company’s incorporation.
2017 December 21 The 35th anniversary of the establishment of Kameoka Plant. Held a planting ceremony of metasequoia trees in Shino-cho, Kameoka City.
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.
2018 May 26 The 55th anniversary of the extraction business.
The grand opening of the Medicinal Grassland in Forest Station Kameoka
2018 August 1 The 88th anniversary of the founding of the company.
The 2nd Phase Construction of "The 1st Stage" in Kameoka Plant; The Redevelopment of the North Western Area. Held a ground breaking ceremony.
2019 January 17 Completed Logistics Base and Dangerous Object Warehouses.
2019 April 8 The 3rd Phase Construction of "The 1st Stage" in Kameoka Plant; The Redevelopment of Midosuji Boulevard. Held a ground breaking ceremony.
2020 February 22 Completed an environmentally friendly Administration Building to which the geothermal hybrid air-conditioning system and a green roof were introduced. Completed the 2nd Spray Drying Facility.
2020 April 8 The full opening of the Central Main Street.
2020 Augst 1 Celebrated the 90th anniversary of the founding of the company. The 3rd Entrepreneurship
2020 December 12 Offered a special concert to Kameoka City in commemoration of the 90th anniversary of the founding of the company.
2020 December 21 Planted a fragrant olive in commemoration of the 120 Anniversary of the Founder's birth.
Opened Children's Play Area in Galleria Kameoka
2021 January 8 Started the Reiwa Era's Major Renovation of the Headquarters Building.
Design and Supervision: Morizo-
Execution: Tobase Shrines and Temples Construction, Co., Ltd.
2021 March 9 Landscape Improvement Project of the Nanatani River
Planted "Nanatani River's Cherry Trees".
2021 May 19
(April 8 by lunar calendar) 		Held an Online Celebration to Introduce the Landmark.
2021 June 28
 The preceding work of the 2nd phase construction of the 1st Spray Drying Facility.

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