| 1952 March | Okazaki Jozo (Brewing) Co., Ltd. was established with a capital of 1.5 million yen for the manufacture of miso (soybean paste) in Okazaki (Aichi prefecture, Japan). |
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| 1964 September | The company name is changed to Okazaki Marusan Co., Ltd. Mixed miso has been released. |
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| 1970 February | JYUNSEI KOJI miso has been released. |
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| 1972 March | Company headquarters and plant relocated to the current address. |
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| 1980 April | The construction of the soymilk plant at the headquarters has been completed. |
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| 1983 January | The company name was changed to MARUSAN-AI Co., Ltd. The capital has increased to 230 million yen. |
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| 1985 June | American Soy Products Inc. was established as a joint venture in the United States, and soymilk production was launched. |
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| 1992 July | Takumi Co., Ltd. was established ( Toyama prefecture, Japan ) |
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| 1993 January | Beverage plants became a JAS( Japan Agricultural Standard ) -certified ( certified by the Ministry of Agriculture, Forestry, and Fisheries of Japan. ) |
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| 1993 April | Takumi Co., Ltd. relocated to the current address. |
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| 2001 June | Listed on the Nagoya Stock Exchange ( 2nd section ). Capital increased to 562.14 million yen. |
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| 2001 September | Certified ISO9001:1994. ( soymilk products ) |
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| 2002 February | Certified as an organic soymilk manufacturer under national organic program ( Organic JAS ). |
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| 2002 June | The construction of the soymilk plant with soy pulp processing facilities at the headquarters has been completed. |
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| 2002 September | Certified ISO9001:2000. ( non-alcoholic beverages products ) |
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| 2003 December | Stocks purchase in Tamai-miso Co., Ltd. ( to make the company a subsidiary ). |
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| 2004 March | New soymilk plant in Gunma prefecture launched production. |
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| 2004 September | The scope of ISO9001:2000 expanded to include miso. |
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| 2005 March | Certified as 'Aichi Quality Companies.' ( The promotion of Aichi prefectual government for manufacturing companies in Aichi ) |
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| 2005 September | The scope of ISO9001:2000 expanded to include Kanto plant. |
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| 2006 February | Capital increased to 865.44 million yen. |
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| 2006 September | The scope of ISO9001:2000 expanded to include Takumi Co., Ltd. |
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| 2006 October | The construction of the new logistics center has been completed. |
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| 2007 March | Marketing launched of the first reduced-calorie soymilk in the industry. |
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| 2007 September | The scope of ISO9001:2000 expanded to include all products. |
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| 2009 March | Marketing launched of 'Premium soymilk' using our premium soy beans 'Kinusayaka.' |
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| 2009 December | 'Premium soymilk' get an award from a news paper publisher. |
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| 2010 March | Marketing launched of 'SOY YOGURT' ( fermented soymilk like yogurt, with lactic acid bacteria, non-dairy, cholesterol-free and sugar-free ) |
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| 2010 September | Certified ISO9001:2008. |
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| 2012 March |
Marusan.Ai ( Shanghai ) Co., LTD. Established. ( Shanghai, CHINA ) |
| Marketing launched new soymilk package with screw cap for the first time in Japan. |
| 2013 July | Conclude the exclusive license contract with Blue Diamond Growers. |
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| 2013 September | Marketing launched of the first Almond milk 'Almond Breeze' in Japan. |
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| 2014 June | Manufacturing technical guidance contract of soybean milk and licensing agreement are concluded with SAHACHOL FOOD SUPPLIES CO., LTD. |
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| 2015 December | Mr.ITO Akinori assumed office as Chairman of board of directors. Mr.WATANABE Kuniyasu assumed office as President. |
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| 2016 January | Established MARUSAN-AI TOTTORI Co., Ltd. ( Tottori prefecture, Japan ) |
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| 2016 November | Certified FSSC22000 ( soymilk and Miso plants at Head office ). |
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| 2017 January | MARUSAN-AI ( THAILAND ) Co., Ltd. Established. ( Bangkok, Thailand ) |
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| 2017 June | MARUSAN-AI TOTTORI Co., Ltd. Soymilk plant starts operation. |
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| 2017 July | Capital participation in Haining Yufeng Brewing Co., Ltd. |
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| 2018 June | Sold stocks of American Soy Products Inc. established as a joint venture in the United States. |
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| 2018 September | Certified FSSC22000 ( Kanto plant ). |
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| 2019 April | ALMOND MILK miso has been released. |
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| 2019 August | Certified FSSC22000 (Tamai-miso Co., Ltd.). |
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| 2019 November | Certified FSSC22000 (Marusanai-tottori Co., Ltd.). |
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| 2020 September | SOY SHREDDED CHEESE has been released. |
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| 2020 November | The construction of the Sakaizawa soymilk plant at Takumi Co., Ltd. has been completed. |
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| 2021 February | The construction of the 2nd logistics center has been completed. |
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| 2021 December | Mr.WATANABE Kuniyasu assumed office as Chairman of board of directors. Mr.SAKAI Nobuyoshi assumed office as President. |
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| 2022 March | 70th anniversary of establishment. |
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