| 1964-04 |
April 1964: Company established in Higashisukamachi, Nakamura-ku, Nagoya City |
| 1964-04 |
日本空調サービス株式会社を設立 |
| 1964-04 |
名古屋市中村区東宿町に会社設立 |
| 1964-04-28 |
Established: April 28, 1964 |
| 1964-04-28 |
設立 |
| 1967-10 |
October 1967: Osaka Sales Office established (currently Osaka Branch) |
| 1967-10 |
大阪営業所を設置（現：大阪支店） |
| 1969-08 |
社是を決定 |
| 1970-04 |
April 1970: Nagoya Sales Office established (currently Nagoya Branch) |
| 1970-04 |
名古屋営業所を設置（現：名古屋支店） |
| 1970-08 |
August 1970: Company logo decided |
| 1970-08 |
社名ロゴを決定 |
| 1971-10 |
October 1971: Tokyo Sales Office established (currently Tokyo Branch) |
| 1971-10 |
東京営業所を設置（現：東京支店） |
| 1974-02 |
February 1974: Fukuoka Branch established (currently Kyushu Branch) |
| 1974-02 |
福岡支店を設置（現：九州支店） |
| 1975-04 |
April 1975: Yokohama Sales Office established (currently Yokohama Branch) |
| 1975-04 |
横浜営業所を設置（現：横浜支店） |
| 1976-08 |
August 1976: Tsukuba Gakuen City Sales Office established (currently Tsukuba Branch) |
| 1976-08 |
筑波学園都市営業所を設置（現：筑波支店） |
| 1982-09 |
September 1982: Hiroshima Sales Office established (currently Chugoku-Shikoku Branch) |
| 1982-09 |
広島営業所を設置（現：中四国支店） |
| 1983-12 |
December 1983: Sapporo Branch established (currently Hokkaido Branch) |
| 1983-12 |
札幌支店を設置（現：北海道支店） |
| 1985-06 |
June 1985: Started TECS (Comprehensive Environmental Diagnosis System) Business |
| 1985-06 |
TECS（総合環境診断システム）事業を開始 |
| 1987-06 |
June 1987: Added to business content: Design, construction, maintenance, and management of clean rooms; Soundproofing work; Design, construction, maintenance, and management of radiation and electromagnetic wave shielding work |
| 1987-06 |
クリーンルームの設計・施工・保守・管理、防音工事・放射線・電磁波遮へい工事の設計・施工・保守・管理を事業内容に追加 |
| 1993-12 |
December 1993: Developed new method for radiation dose measurement: Dose Collector |
| 1993-12 |
放射線量測定の新方式ドーズコレクタを開発 |
| 1996-11 |
November 1996: Listed on the over-the-counter market of the Japan Securities Dealers Association |
| 1996-11 |
日本証券業協会に株式を店頭登録 |
| 1999-01 |
January 1999: Established Suzhou Nichu Sanyo Mechanical & Electrical Technology Co., Ltd. (China, Suzhou City) (currently a consolidated subsidiary) |
| 1999-01 |
蘇州日空山陽機電技術有限公司（中国・蘇州市）を設立（現：連結子会社） |
| 1999-04 |
April 1999: Established Nichu Business Service Co., Ltd. (currently a consolidated subsidiary) |
| 1999-04 |
日空ビジネスサービス株式会社を設立（現：連結子会社） |
| 2002-02 |
February 2002: Established Nichu Tsukuba Co., Ltd. |
| 2002-02 |
株式会社日空筑波を設立 |
| 2002-09 |
September 2002: Made Nippon Air Conditioning System Co., Ltd. and Nippon Air Conditioning Hokuriku Co., Ltd. subsidiaries (currently consolidated subsidiaries) |
| 2002-09 |
日本空調システム株式会社及び株式会社日本空調北陸を子会社化（現：連結子会社） |
| 2003-01 |
January 2003: Made East Japan Air Conditioning Management Co., Ltd. a subsidiary |
| 2003-01 |
東日本空調管理株式会社を子会社化 |
| 2003-02 |
February 2003: Made Nippon Air Conditioning Tohoku Co., Ltd. a subsidiary (currently a consolidated subsidiary) |
| 2003-02 |
株式会社日本空調東北を子会社化（現：連結子会社） |
| 2003-08 |
August 2003: Established Yokohama Nichu Co., Ltd. |
| 2003-08 |
株式会社横浜日空を設立 |
| 2004-12 |
December 2004: Listed on the JASDAQ Securities Exchange |
| 2004-12 |
ジャスダック証券取引所に株式を上場 |
| 2005-06 |
June 2005: Added to business content: Personnel dispatching business; Consulting services for building and attached equipment maintenance management |
| 2005-06 |
人材派遣業務、建物及び付属設備の維持管理に関するコンサルタント業務を事業内容に追加 |
| 2006-09 |
June 2006: Listed on the Second Section of the Tokyo Stock Exchange and Nagoya Stock Exchange (delisted from JASDAQ in October 2006) |
| 2006-09 |
東京証券取引所・名古屋証券取引所 市場第二部に株式を上場（上記に伴い2006年10月にジャスダック証券取引所への株式の上場を廃止） |
| 2007-06 |
June 2007: Added to business content: Design, construction, operation, and monitoring of systems for improving energy consumption and reducing environmental load of air conditioning, water supply and drainage, and electrical equipment |
| 2007-06 |
空調設備、給排水設備、電気設備等のエネルギー消費の効率向上、環境負荷低減等に関するシステムの設計、施工、運転、監視ならびにそれらのコンサルタント業務を事業内容に追加 |
| 2007-10 |
October 2007: Listed on the First Section of the Tokyo and Nagoya Stock Exchanges |
| 2007-10 |
東京証券取引所・名古屋証券取引所 市場第一部銘柄指定 |
| 2008-04 |
April 2008: Kanto Branch established |
| 2008-04 |
関東支店を設置 |
| 2010-09 |
September 2010: Renamed Tsukuba Nichu Co., Ltd. to Eitech Japan Co., Ltd. (currently a consolidated subsidiary) |
| 2010-09 |
株式会社日空筑波をイーテック・ジャパン株式会社に商号変更（現：連結子会社） |
| 2011-10 |
October 2011: Established Shanghai Nichu Sanyo International Trading Co., Ltd. (China, Shanghai) (currently a consolidated subsidiary) |
| 2011-10 |
上海日空山陽国際貿易有限公司（中国・上海市）を設立（現：連結子会社） |
| 2012-12 |
December 2012: Eitech Japan Co., Ltd. absorbed Yokohama Nichu Co., Ltd. |
| 2012-12 |
イーテック・ジャパン株式会社が株式会社横浜日空を吸収合併 |
| 2013-06 |
June 2013: Added to business content: Power generation and electricity supply |
| 2013-06 |
発電及び電気の供給を事業内容に追加 |
| 2015-04 |
April 2015: Established Japan Air Conditioning Shikoku Co., Ltd. |
| 2015-04 |
日本空調四国株式会社を設立 |
| 2015-08 |
August 2015: Established NACS BD Co., Ltd. (Bangladesh, Dhaka) (currently a non-consolidated subsidiary) |
| 2015-08 |
NACS BD Co., Ltd.（バングラデシュ・ダッカ市）を設立（現：非連結子会社） |
| 2015-11 |
November 2015: Acquired shares of Evar Air-conditioning & Engineering Pte Ltd (Singapore) (currently a consolidated subsidiary) |
| 2015-11 |
Evar Air-conditioning & Engineering Pte Ltd（シンガポール）の株式を取得（現：連結子会社） |
| 2016-03 |
March 2016: Established NACS Singapore Pte. Ltd. (Singapore) (currently a consolidated subsidiary) |
| 2016-03 |
NACS Singapore Pte. Ltd.（シンガポール）を設立（現：連結子会社） |
| 2016-04 |
April 2016: Absorbed and merged Nippon Air Conditioning Mie Co., Ltd. (currently Mie Branch) |
| 2016-04 |
株式会社日本空調三重を吸収合併により支店化（現：三重支店） |
| 2016-06 |
June 2016: Established joint venture NACS TPS ENGINEERING CO., LTD. (Bangkok, Thailand) |
| 2016-06 |
合弁会社 NACS TPS ENGINEERING CO., LTD.（タイ・バンコク市）を設立 |
| 2017-03 |
March 2017: Invested in NIPPON KUCHO SERVICES (M) SDN. BHD. (Malaysia, Selangor) (dissolved in February 2023) |
| 2017-03 |
NIPPON KUCHO SERVICES (M) SDN. BHD.（マレーシア・セランゴール州）に出資（2023年2月に解散） |
| 2017-04 |
April 2017: Merged East Japan Air Conditioning Management Co., Ltd. |
| 2017-04 |
東日本空調管理株式会社を吸収合併により事業統合 |
| 2017-06 |
June 2017: Added to business content: Manufacturing, planning, and sales of solar power generation equipment |
| 2017-06 |
太陽光発電装置付電気器械の製造、企画及び販売を事業内容に追加 |
| 2017-11 |
November 2017: Invested in Vietnam NACS Engineering Co., Ltd. (Hanoi) (currently a consolidated subsidiary) |
| 2017-11 |
NACS ENGINEERING VIETNAM CO., LTD.（ベトナム・ハノイ市）に出資（現：連結子会社） |
| 2018-03 |
March 2018: Opened sales offices in Tottori and Kochi (achieved presence in all prefectures) |
| 2018-03 |
鳥取及び高知に営業所を開設（全都道府県進出を達成） |
| 2018-04 |
April 2018: Merged West Japan Air Conditioning Management Co., Ltd. and Japan Air Conditioning Shikoku Co., Ltd.; established Shizuoka and Gifu branches |
| 2018-04 |
西日本空調管理株式会社及び日本空調四国株式会社を吸収合併により事業統合 |
| 2019-04 |
April 2019: Merged Japan Air Conditioning Gifu Co., Ltd. |
| 2019-04 |
株式会社日本空調岐阜を吸収合併により事業統合 |
| 2019-06 |
June 2019: Added to business content: Design, construction, maintenance, and management of various machinery; Sale and export/import of goods |
| 2019-06 |
各種機械装置の設計・施工・保守・管理、物品の売買及び輸出入を事業内容に追加 |
| 2020-04 |
April 2020: Merged Japan Air Conditioning Tokai Co., Ltd. |
| 2020-04 |
株式会社日本空調東海を吸収合併により事業統合 |
| 2022-04 |
April 2022: Transitioned to Tokyo Stock Exchange Prime Market and Nagoya Stock Exchange Premier Market |
| 2022-04 |
株式会社東京証券取引所プライム市場、株式会社名古屋証券取引所プレミア市場へ移行 |
| 2022-06 |
June 2022: Added to business content: Design, construction, maintenance, and management of telecommunications |
| 2022-06 |
電気通信の設計・施工・保守・管理を事業内容に追加 |
| 2023-06 |
June 2023: Changed trade name of joint venture NACS TPS ENGINEERING CO., LTD. to NACS KUCHO (THAILAND) CO., LTD. (currently a consolidated subsidiary) |
| 2023-06 |
合弁会社 NACS TPS ENGINEERING CO., LTD.（タイ・バンコク市）をNACS KUCHO(THAILAND) CO., LTD. に商号変更（現：連結子会社） |
| 2024-04 |
April 2024: Japan Air Conditioning Service celebrates its 60th anniversary |
| 2024-04 |
日本空調サービス 創業60周年 |
| 2025-04 |
April 2025: Full-scale operation of the Technology and Training Center begins |
| 2025-04 |
技術・研修センター本格稼働開始 |
