Corporate history
| July 1972 |
Established Negami Chemical Industrial Co., Ltd with 45 million yen in capital. |
| August 1972 |
Acquired industrial land from Ishikawa Neagari-machi land development corporation and began industrial construction. |
| January 1973 |
Company start-up. |
| January 1977 |
Completed the second work site. |
| January 1982 |
completed the third work site. |
| November 1984 |
 Green Club Completed the public welfare hall “Green Club“ |
| April 1985 |
Opened Tokyo liaison office. |
| January 1991 November 1991 |
Completed the fifth work site. |
| January 1992 |
 Technology Research Center Completed the technology research center. |
| May 1995 |
Relocated Tokyo liaison office to Kanda. |
| January 1997 |
 Engineering Center Completed the Engineering Center. |
| November 1999 |
Masaki Shintani was appointed as president (the former company president Eiichiro Yoshiyama stayed on as a consultant). |
| September 2003 |
Changed the Tokyo liaison office name to Tokyo office. |
| October 2004 |
Obtained ISO9001. |
| December 2004 | Completed the sixth work site.
 The sixth work site |
| October 2005 |
Obtained ISO14001. |
| October 2007 |
Syunji Sugano was appointed as president (the former company president Masaki Shintani stayed on as chairman). |
| October 2008 |
Completed the seventh work site. |
| December 2009 |
Completed fixed temperature warehouse. |
| October 2011 |
Expanded laboratory. |
| November 2011 |
Nobuki Hosokawa was appointed as an executive managing director. |
| February 2012 |
Increased the capital to 80 million yen. |
| October 2013 |
Relocated Tokyo office to Kanda-Suda-Cho.  Tokyo office |
| December 2015 |
Fukui factory completion.  Fukui factory |
| May 2018 |
Completed the eighth work site.  he eighth work site |
| Nov 2019 |
Takeshi Nishita was appointed as President.（The former company president Shunji Sugano stayed on as chairman.） |
| July 2022 |
Completion of renewal of the public welfare hall “Green Club”  Green Club |
| October 2023 |
Completed LPG boiler.  LPG boiler |
| April 2025 |
Completed Wastewater treatment facility.  Wastewater treatment facility |
| August 2025 |
Completed Designated combustibles warehouse.  Designated combustibles warehouse |
- July 1972
- Established Negami Chemical Industrial Co., Ltd with 45 million yen in capital.
- August 1972
- Acquired industrial land from Ishikawa Neagari-machi land development corporation and began industrial construction.
- January 1973
- Company start-up.
- January 1977
- Completed the second work site.
- January 1982
- completed the third work site.
Increased the capital to 60 million yen. - November 1984
- Completed the public welfare hall “Green Club“
- April 1985
- Opened Tokyo liaison office.
- January 1991
- Completed the fifth work site.
- November 1991
- Eiichiro Yoshiyama was appointed as president(the former company president Katsumi Tsuji stayed on as chairman).
- January 1992
- Completed the technology research center.
- May 1995
- Relocated Tokyo liaison office to Kanda.
- January 1997
- Completed the Engineering Center.
- November 1999
- Masaki Shintani was appointed as president (the former company president Eiichiro Yoshiyama stayed on as a consultant).
- September 2003
- Changed the Tokyo liaison office name to Tokyo office.
- October 2004
- Obtained ISO9001.
- December 2004
- Completed the sixth work site.
- October 2005
- Obtained ISO14001.
- October 2007
- Syunji Sugano was appointed as president (the former company president Masaki Shintani stayed on as chairman).
- October 2008
- Completed the seventh work site.
- December 2009
- Completed fixed temperature warehouse.
- October 2011
- Expanded laboratory.
- November 2011
- Nobuki Hosokawa was appointed as an executive managing director.
Masaki Shintani stayed on as a chairman.(Outside director) - February 2012
- Increased the capital to 80 million yen.
Negami employee stock ownership system started. - October 2013
- Relocated Tokyo office to Kanda-Suda-Cho.
- December 2015
Fukui factory completion.- May 2018
- Completed the eighth work site.
- Nov 2019
- Takeshi Nishita was appointed as President.（The former company president Shunji Sugano stayed on as chairman.）
- July 2022
-
Completion of renewal of the public welfare hall “Green Club”
- October 2023
-
Completed LPG boiler.
- April 2025
-
Completed Wastewater treatment facility.
- August 2025
-
Completed Designated combustibles warehouse.