1960

• Apr. 1964

  Nippon Air Conditioning Services Co., Ltd. is established (business activities: air conditioning, electrical equipment maintenance, air-conditioning design and construction, refrigeration equipment manufacture, sales, and repair, electrical machinery sales and repair）
   

• Oct. 1967

  Osaka service office is established (currently Osaka office)

Apr. 1964 The company is established in Higashijukucho, Nakamura-ku, Nagoya-shi Aichi

• Aug. 1969
  Our company policy is established

Aug. 1969 Our company policy is established

1970

• Apr. 1970

  Nagoya service office is established (currently Nagoya office)

• Aug. 1970

  Company logo is chosen
   

• Oct. 1971

  Tokyo service office is established (currently Tokyo office)
   

• Feb. 1974

  Fukuoka service office is established (currently Kyushu office)
   

• Apr. 1975

  Yokohama service office is established (currently Yokohama office)
   

• Aug. 1976

  Tsukuba Science City service office is established (currently Tsukuba office)

Aug. 1970 Logo chosen through a public process

1980

• Sep. 1982
  Hiroshima service office is established (currently Chushikoku office)
   
• Dec. 1983
  Sapporo service office is established (currently Hokkaido office)

• Jun. 1985
  Start of TECS (Total Environmental Consulting System) service
   
• Jun. 1987
  Added the following business activities:
  Cleanroom design, construction, maintenance, and management Soundproofing, radiation, and electromagnetic wave shield design, construction, maintenance, and management

Jun. 1985 Start of the new TECS service

1990

• Dec.1993
  Developed the new "Dose Collector" method of radiation measurement
   
• Nov. 1996
  Listed with the Japan Securities Dealers Association as an over-the-counter stock

Dec. 1993 Development of the "Dose Collector"

• Jan. 1999
  Suzhou Nikku Suntec Electromechanical Technology Co., Ltd. is established in Suzhou, China (currently an overseas consolidated subsidiary)
   
• Apr. 1999
  Nikku Business Services Co., Ltd. is established (currently a consolidated subsidiary)

Jan. 1999 Suzhou Nikku Suntec Electromechanical Technology is established in Suzhou, China (currently an overseas consolidated subsidiary)

2000

• Feb. 2002
  Nikku Tsukuba Co., Ltd. is established
   
• Sep. 2002
  Nippon Air Conditioning Systems Co., Ltd. and Nippon Air Conditioning Hokuriku Co., Ltd. are all acquired as subsidiaries (currently consolidated subsidiaries)
  Nippon Air Conditioning Tokai Co., Ltd., Nippon Air Conditioning Gifu Co., Ltd., Nippon Air Conditioning Mie Co., Ltd. and Nishi Nippon Air Conditioning Management Co., Ltd. are acquired as a subsidiary

• Jan. 2003
  Higashi Nippon Air Conditioning Management Co., Ltd. is acquired as a subsidiary
   
• Feb. 2003
  Nippon Air Conditioning Tohoku Co., Ltd. is acquired as a subsidiary (currently a consolidated subsidiary)
   
• Aug. 2003
  Yokohama Nikku Co., Ltd. is established

• Aug. 2003
  A single unit of trading stock is changed from 1000 to 100 shares.
   
• Dec. 2004
  Shares are listed on the JASDAQ Securities Exchange
   
• Jun. 2005
  Added the following business activities:
  Temporary staffing business, building as auxiliary equipment maintenance, management consulting business Sep. 2006
   
• Sep. 2006
  Shares are listed on the second section of the Tokyo and Nagoya Stock Exchanges (along with delisting from the above mentioned JASDAQ Securities Exchange in October, 2006)
   
• Jun. 2007
  Added the following business activities:
  Improving the energy efficiency of systems such as air conditioning, water supply and drainage, and electrical equipment. Design, construction, operation, and monitoring of environmental impact reduction systems, as well as consultation in that area
   
• Oct. 2007
  Stock designated to the first section of the Tokyo and Nagoya Stock Exchanges
   
• Apr. 2008
  Kanto office is established

Aug. 2003 A single unit of trading stocks is changed from 1000 (top) to 100 (bottom) shares.

2010

• Sep. 2010
  Nikku Tsukuba Co., Ltd. changes its name to E-tec Japan, Co., Ltd.(currently a consolidated subsidiary)
   
• Oct. 2011
  Shanghai Nikku Suntec International Trading Co., Ltd. is established in Shanghai, China (currently an overseas consolidated subsidiary)
   
• Dec. 2012
  E-TEC Japan Co., Ltd. merges with Yokohama Nikku Co., Ltd. (currently a consolidated subsidiary)
   
• Jun. 2013
  Added the following business activities:
  Electric power generation and supply
   
• Apr. 2015
  Nippon Air Conditioning Shikoku Co., Ltd. is established

• Aug. 2015
  NACS BD Co., Ltd. is established in Dhaka, Bangladesh (currently an oveseas non-consolidated subsidiary)

Aug. 2015 NACS BD Co., Ltd. is established in Dhaka, Bangladesh (currently an oveseas non-consolidated subsidiary)

• Nov. 2015
  Evar Air-conditioning & Engineering Pte Ltd's shares acquired (Singapore) (currently an overseas consolidated subsidiary)
   
• Mar. 2016
  NACS Singapore Pte. Ltd. is established in Singapore (currently an overseas consolidated subsidiary)
   
• Apr. 2016
  Nippon Air Conditioning Mie Co., Ltd. is incorporated (currently Mie office)
   
• Jun. 2016
  The joint venture NACS TPS ENGINEERING CO., LTD. is established in Bangkok, Thailand (currently an oveseas consolidated subsidiary)

Nov. 2015 Evar Air-conditioning & Engineering Pte Ltd's shares acquired (Singapore)(currently an overseas consolidated subsidiary)

• Mar. 2017
  Bought stakes in NIPPON KUCHO SERVICES (M) SDN. BHD. (Selangor, Malaysia)（dissolved in Feb. 2023）
   
• Apr. 2017
  Higashi Nippon Air Conditioning Management Co., Ltd. is incorporated
   
• Jun. 2017
  Added the following business activities:
  Design, manufacture, and sales of solar powered electronic goods

Mar. 2017 Bought stakes in NIPPON KUCHO SERVICES (M) SDN. BHD. (Selangor, Malaysia) （dissolved in Feb. 2023）

• Nov. 2017
  Bought stakes in NACS ENGINEERING VIETNAM CO., LTD. (Hanoi, Vietnam) (currently an overseas consolidated subsidiary)
  Bought stakes in NACS Engineering Myanmar Co., Ltd. (Yangon, Myanmar) (currently an overseas consolidated subsidiary)
   
• Mar. 2018
  Tottori service office and Kochi service office is established（Achieve to advance all prefectures）
   
• Apr. 2018
  Nishi Nippon Air Conditioning Management Co., Ltd. and Nippon Air Conditioning Shikoku Co., Ltd. is incorporated
  
  Shizuoka office and Gifu office is established


• Apr. 2019
  Nippon Air Conditioning Gifu Co., Ltd. is incorporated

• Jun. 2019
  Added the following business activities:
  Various mechanical devices design, construction, maintenance, and management.
  Trading and importing and exporting the products.

• Apr. 2020
  Nippon Air Conditioning Tokai Co., Ltd. is incorporated

• Apr. 2022
  Transit to the Prime Market in the Tokyo Stock Exchange in accordance with the restructuring of market segments
  
  Transit to the Premier Market in the Nagoya Stock Exchange in accordance with the restructuring of market segments

• Jun. 2022
  Added the following business activities:
  telecommunications equipments design, construction, maintenance, and management

Nov. 2017 Bought stakes in NACS ENGINEERING VIETNAM CO., LTD. (Hanoi, Vietnam) (currently an overseas consolidated subsidiary)

Present