| February 1949 |
Foundation, started manufacturing needles for measuring instrunments |
| September 1964 |
Started manufacturing medical devices. Received Ministry of Health and Welfare approval Chiba No. 28 |
| 1964 |
Launched suture needles, silk sutures, nylon suture with suture needlesm polyester suture with suture needles |
| 1969 |
Launched Japan's first patch |
| May 1970 |
Establishment of Kono Seisakusho Co., Ltd. |
| 1974 |
Launched the Japan's first microsurgery suture with suture needle |
| 1975 |
Launched TSUGE LOOPED SUTURE |
| 1978 |
Started using the 2nd corporate logo mark |
| March 1979 |
Establishment of Head Plant |
| November 1995 |
Establishment of Ibaraki Plant. Received Ministry of Health and Welfare approval Ibaraki No. 174 |
| January 1996 |
Launched VSORB |
| June 1997 |
Launched ASFLEX |
| April 1998 |
Establishment of Crownjun Kono., Ltd. |
| 2000 |
Started using the 3rd corporate logo mark |
| April 2004 |
Launched the world's smallest suture needle |
| May 2005 |
Obtained ISO13485 certification |
| August 2008 |
Relocation of the Tokyo Head Office of Crownjun Kono Co., Ltd. |
| October 2009 |
Renaming of Ibaraki Plant to Tsukuba Plant |
| October 2009 |
Expansion of the Tsukuba Plant (1st phase) |
| June 2010 |
Emperor's inspection tour to Head Office |
| December 2011 |
Obtained pharmaceutical approval in China |
| April 2016 |
Expansion of the Tsukuba Plant (2nd phase) |
| April 2017 |
Started using the 4th (present) corporate logo mark |
| April 2018 |
Launched LACLON |
| December 2016 |
Establishment of the Shanghai Office |
| August 2017 |
Establishment of CJK Holdings Co., Ltd. |
| March 2019 |
Foundation of CJK Medical Labo Co., Ltd. |
| May 2020 |
Obtained FDA approval in the United States of America |
| January 2022 |
Relocation of the Tokyo Head Office of Crownjun Kono Co., Ltd. |
| August 2024 |
Relocation of the Head Office of CJK Medical Labo Co.,Ltd. |
| April 2019 |
Received "Incentive Award" at the 31st Small and Medium Enterprise New Technology and New Product Awards |
| January 2018 |
Received the "Incentive Award" at the Chiba Prefecture Gender Equality Promotion Office Awards |
| December 2017 |
Selected as a Companies Driving Regional Growth by the Ministry of Economy, Trade and Industry |
| January 2015 |
Received the "Chiba Governor's Award" at the 20th Chiba "Genkijirushi" Company Awards |
| March 2011 |
Jointly received the Japan Creation Award 2010 Micro Medical Prize |
| July 2009 |
Received the "Third Monodzukuri Nippon Grand Award Prime Minister's Prize" |
| June 2009 |
Certified as "Chiba Monozukuri Certified Product 2008" |
| January 2009 |
Received the "Excellent Product and Service Award" at the 14th Chiba "Genkijirushi" Company Awards |
| September 2008 |
Selected for the "2008 Edition of 300 Vigorous Manufacturing SMEs" sponsored by the Small and Medium Enterprise Agency, Ministry of Economy, Trade and Industry |
| December 2007 |
Received the "Technical Award" at the Japan Society of Mechanical Engineers (JSME) Kanto Branch |
| January 2006 |
Received the "Excellent President Award" at the Chiba Prefecture Venture Business Manager of the Year Award |
| February 2001 |
Received the "Encouragement Award" at the Chiba "Genkijirushi" Company Awards. |
