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                     December 2020  | 
                                 
                     Chongqing branch plant of Shanghai Neturen Co.,Ltd established in Chongqing,China.  | 
                        
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                     April 2019  | 
                                 
                     Human Resources Development Center established  | 
                        
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                     January 2016  | 
                                 
                     Kani NH Plant established  | 
                        
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                     April 2015  | 
                                 
                     NETUREN MEXICO, S.A. de C.V. in Mexico established  | 
                        
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                     November 2013  | 
                                 
                     Capital participation in Tianjin Fengdong Heat Treatment Co., Ltd., Tianjin, China  | 
                        
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                     November 2013  | 
                                 
                     Ibaraki Plant established.  | 
                        
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                     September 2013  | 
                                 
                     Joint venture PT. NETUREN INDONESIA established in the republic of Indonesia.  | 
                        
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                     January 2013  | 
                                 
                     Designated subsidiary Neturen Czech s.r.o. established in the Czech Republic.  | 
                        
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                     April 2011  | 
                                 
                     Excellent Welding Shear Reinforcement Manufacturing Company accreditation acquired by the Iwaki and Ako Plants. Accreditation number: JRJI-YUHO-008-009  | 
                        
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                     February 2011  | 
                                 
                     Subsidiary company Neturen (China) Slewing Bearing Co., Ltd. established in Shangdon Province, China.  | 
                        
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                     October 2008  | 
                                 
                     Asahidenpa Kogyosho Co., Ltd. established.  | 
                        
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                     2008  | 
                                 
                     Began selling slewing bearings  | 
                        
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                     October 2008  | 
                                 
                     Kobe Plant established.  | 
                        
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                     October 2007  | 
                                 
                     Capital participation in Komatsu Undercarriage China Corporation Shangdong Province, China.  | 
                        
|  
                     October 2007  | 
                                 
                     Amagasaki Plant established.  | 
                        
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                     August 2007  | 
                                 
                     Kani Plant established.  | 
                        
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                     July 2007  | 
                                 
                     Neturen Takuto Co., Ltd. established.  | 
                        
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                     January 2006  | 
                                 
                     Joint venture Neturen America Corporation established in the U.S.A.  | 
                        
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                     July 2006  | 
                                 
                     Joint venture Guangzhou Fengdong Neturen Co., Ltd. (consolidated subsidiary) established in Guangzhou Province, China.  | 
                        
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                     August 2005  | 
                                 
                     Joint venture Yancheng Neturen Co., Ltd. (consolidated subsidiary) established in Jiangsu Province, China.  | 
                        
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                     2003  | 
                                 
                     Started selling hollow rack bars  | 
                        
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                     August 2003  | 
                                 
                     Okayama Plant established.  | 
                        
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                     July 2003  | 
                                 
                     Shanghai Neturen Co., Ltd. established in Shanghai, China.  | 
                        
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                     July 2001  | 
                                 
                     Head office relocated to Oval Court Osaki Mark West.  | 
                        
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                     July 2000  | 
                                 
                     Gifu Plant and Niigata Plant of Neturen Heat Treat Co. Ltd. established.  | 
                        
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                     December 1999  | 
                                 
                     Technical licensing agreement for transistor inverters signed with Pillar Induction of America.  | 
                        
|  
                     September 1999  | 
                                 
                     Technical licensing agreement for transistor inverters signed with Hisen Enterprises Co. Ltd. in Taiwan.  | 
                        
|  
                     January 1999  | 
                                 
                     Neturen Hymec Co., Ltd. established.  | 
                        
|  
                     November 1996  | 
                                 
                     Neturen USA, Inc. established in the U.S.A.  | 
                        
|  
                     May 1996  | 
                                 
                     “Neturen” adopted as the company name.  | 
                        
|  
                     April 1996  | 
                                 
                     ITW manufacturing technology licensing agreement signed with Mubea Inc.  | 
                        
|  
                     October 1995  | 
                                 
                     Capital participation in Hokuriku United Forging Industry (present day PT Komatsu Undercarriage Indonesia) in Indonesia.  | 
                        
|  
                     October 1994  | 
                                 
                     ITW manufacturing technology licensing agreement signed with Muhr und Bender KG.  | 
                        
|  
                     June 1994  | 
                                 
                     ITW manufacturing technology licensing agreement signed with Suzuki Metal Industry Co., Ltd.  | 
                        
|  
                     April 1992  | 
                                 
                     Nagoya Plant of the Heating Machine Department (present day Chubu Service Center) established.  | 
                        
|  
                     October 1991  | 
                                 
                     Neturen Kofu Co., Ltd. (Currently Neturen Heat Treat Co., Ltd.)’s Yamagata Plant established  | 
                        
|  
                     October 1991  | 
                                 
                     Iwaki Plant established.  | 
                        
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                     August 1990  | 
                                 
                     Hiratsuka Plant of the Heating Machine Department established.  | 
                        
|  
                     March 1989  | 
                                 
                     Technical licensing agreement for transistor inverters signed with Pillar Induction of America.  | 
                        
|  
                     July 1987  | 
                                 
                     Joint venture Korea Neturen Co., Ltd, established.  | 
                        
|  
                     September 1985  | 
                                 
                     Neturen Komatsu Co., Ltd. established.  | 
                        
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                     March 1985  | 
                                 
                     General accreditation for ulbon spiral hoop reinforcement acquired (Ministry of Construction Housing Notification No. 51)  | 
                        
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                     June 1983  | 
                                 
                     Neturen Kofu Co., Ltd. (present day Neturen Heat Treat Co., Ltd.) established.  | 
                        
|  
                     June 1980  | 
                                 
                     Neturen Meinan Co., Ltd. established.  | 
                        
|  
                     October 1977  | 
                                 
                     Induction Tempered Wire developed and commercialized.  | 
                        
|  
                     April 1977  | 
                                 
                     Unbonded PC steel bar developed and sales launched.  | 
                        
|  
                     February 1977  | 
                                 
                     Sales of hoop reinforcement and flexible wire (high-strength deformed PC steel bar).  | 
                        
|  
                     October 1976  | 
                                 
                     PC steel bar for box culverts developed and sales launched.  | 
                        
|  
                     July 1976  | 
                                 
                     Joint venture Korea Heat Treatment Co., Ltd. established in Korea.  | 
                        
|  
                     May 1973  | 
                                 
                     Neturen Hirakata Co., Ltd. established.  | 
                        
|  
                     October 1971  | 
                                 
                     Kariya Plant established.  | 
                        
|  
                     October 1971  | 
                                 
                     Ako Plant established.  | 
                        
|  
                     July 1970  | 
                                 
                     Deformed PC steel bar for CPC hume pipes developed and sales launched.  | 
                        
|  
                     October 1964  | 
                                 
                     Quenched product special deformed PC steel bar “Ulbon” developed and sales launched.  | 
                        
|  
                     November 1962  | 
                                 
                     Hiratsuka Plant (Currently Hiratsuka Plant, Specialty Steel & Wire Products Division, Production Department) established  | 
                        
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                     July 1961  | 
                                 
                     Received industrial application research subsidy from the Ministry of International Trade and Industry for research into sub-hot surface thread rolling.  | 
                        
|  
                     July 1957  | 
                                 
                     Received industrial application research subsidy from the Ministry of International Trade and Industry for research into low-carbon strong steel bars.  | 
                        
|  
                     August 1956  | 
                                 
                     Received industrial application research subsidy from the Ministry of International Trade and Industry for research PC steel bars.  | 
                        
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                     August 1955  | 
                                 
                     Received industrial application research subsidy from the Ministry of International Trade and Industry for research induction heating equipment using a saturable reactor.  | 
                        
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                     March 1947  | 
                                 
                     Established the Kyoto Plant in the Research Institute for Applied Sciences and began commercial heat treatment processing service.  | 
                        
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                     May 1946  | 
                                 
                     Separated from Nippon Koshuha Steel Co., Ltd., established Neturen Co., Ltd. and began manufacturing induction heating equipment and commercial heat treatment processing service of various mechanical parts at Tamagawa factory.  | 
                        
