Sanko AIR Conditioning Co., Ltd.

Sanko AIR Conditioning Co., Ltd. (株式会社三晃空調) is a Japanese construction and building-services company based in Osaka. Its core business is the design and installation of air-conditioning (HVAC) equipment, sanitary and plumbing systems, and renewal/retrofit works for buildings. The company presents itself as a specialist contractor — its website describes air-conditioning equipment, sanitary equipment, renewal and design as its 'specialised fields' (専業分野). The firm operates primarily in Japan, with a head office in Osaka and a branch network that includes an Osaka head office (大阪本店) and project activity in regions such as Hiroshima and Fukui, as shown by its published works portfolio. Notable listed projects include the Hiroshima Station new station building, the Osaka-Kansai Expo, the Hokuriku Shinkansen Fukui Station snow-melting facilities, and various Sumitomo Realty & Development office towers in Tokyo. Sanko AIR Conditioning is also active in energy efficiency and technical development. It has pursued ZEB (net-zero-energy building) initiatives, holds a patent for a special drainage joint called the 'Step Joint' (ステップ継手), and operates its own training and technology-transfer centre, 'Watts Lab Osaka' (ワッツ・ラボ オオサカ), a fully ZEB-certified facility in Kita-ku, Osaka, used for hands-on and VR-based training. The company is investor-facing, publishing IR information and holding annual general shareholders' meetings; its topics page references the 87th ordinary general shareholders' meeting, indicating a long corporate history. It has been recognised as a 'Health and Productivity Management Outstanding Organisation' (健康経営優良法人) for two consecutive years. In 2025 it disclosed a cyber incident involving unauthorised access and ransomware, which it reported in two notices. Ownership, exact founding year and listing status are not confirmed by the available evidence and are therefore left unspecified.

Sanko AIR Conditioning Co., Ltd. is a Japanese building-services contractor headquartered in Osaka. The company's own materials describe its business as centred on air-conditioning equipment, sanitary equipment, renewal and design, which it calls its specialised fields. Its corporate history is long enough that by 2026 it was holding its 87th ordinary general shareholders' meeting, implying a corporate lineage dating back many decades, although the exact founding year is not stated in the available evidence. Over time the company has built a portfolio of building-services projects across Japan. Published works include the Hiroshima Station new station building, the Osaka-Kansai Expo, the Hokuriku Shinkansen Fukui Station snow-melting facilities, and several Sumitomo Realty & Development office buildings in Tokyo such as Sumitomo Realty Shinjuku First Tower and Sumitomo Realty Shinjuku Central Park Tower. This mix of transport infrastructure, large-scale events and commercial office towers illustrates its role as a specialist subcontractor on major construction projects. In recent years Sanko AIR Conditioning has emphasised energy efficiency and technical development. It has pursued ZEB (net-zero-energy building) initiatives and holds a patent for a special drainage joint called the 'Step Joint' (ステップ継手). It also operates its own training and technology-transfer centre, 'Watts Lab Osaka' (ワッツ・ラボ オオサカ), in Kita-ku, Osaka. Opened as a fully ZEB-certified building, the centre is designed for hands-on training, VR-based learning and the transfer of the company's construction standards and techniques. The company is investor-facing, publishing IR information and holding annual general shareholders' meetings. Its topics page records the 87th ordinary general shareholders' meeting in 2026 and the 86th in 2025, along with notices of officer appointments and changes of representative director. It has also been recognised as a 'Health and Productivity Management Outstanding Organisation' for two consecutive years (2025 and 2026). In late 2025 and early 2026 the company disclosed a cyber incident involving unauthorised access and ransomware, issuing a first report in December 2025 and a second report in March 2026. Ownership structure, exact founding year and listing status are not confirmed by the available evidence.

• Notice of change of representative director and change of roles

• Certified as a 'Health and Productivity Management Outstanding Organisation 2025'

• 86th ordinary general shareholders' meeting resolution notice

• First report on unauthorised access and ransomware incident

• Second report on unauthorised access and ransomware incident

• Certified as a 'Health and Productivity Management Outstanding Organisation 2026' (second consecutive year)

• 87th ordinary general shareholders' meeting resolution notice

Specialist building-services contractor focused on air-conditioning, sanitary and renewal works, with an emphasis on energy efficiency (ZEB) and technical training.

• Air-conditioning equipment works

  Design and installation of HVAC systems for buildings.

• Sanitary equipment works

  Plumbing and sanitary systems for buildings.

• Renewal works

  Retrofit and renewal of existing building services.

• Design services

  Design of building services systems.

• Step Joint (ステップ継手)

  Patented special drainage joint.

• Unauthorised access and ransomware incident (first report)

• Unauthorised access and ransomware incident (second report)

Read more

• Change of representative director and rolesOther

1. 1株式会社三晃空調 公式サイトsanko-air.co.jp
2. 2会社情報 | 株式会社三晃空調sanko-air.co.jp
3. 3SANKO 研修センター | 株式会社三晃空調sanko-air.co.jp
4. 4トピックス | 会社情報 | 株式会社三晃空調sanko-air.co.jp
5. 5Sanko AIR Conditioning Co., Ltd. (Japan) - Wikidatawikidata.org