Obayashi Corporation
130-year-old Japanese general contractor building infrastructure and data centers.
On the record
Checkpoint: Multiplex acquisition expected to close, testing integration and order recovery
The call
Obayashi holds its licensed, well-capitalized position in Japan's contractor tier, but its flat profit growth now trails peer Kajima's faster gains.
Obayashi builds big infrastructure projects like bridges, tunnels, and buildings across Japan. It is hard to replace because Japan's government only lets a handful of companies bid on major projects, and Obayashi has 130 years of data and relationships that new competitors cannot quickly copy. The one thing to watch is whether Obayashi can grow its profits as fast as its rival Kajima, which has been growing much quicker lately; if Obayashi falls further behind, it may signal that even protected companies can lose their edge.
Why
01
AI pressure: None apparent. AI mainly drives demand, data-center builds and site robotics, rather than replacing licensed contractors like Obayashi. Could AI do the core job? Unlikely.
02
Bigger players: Kajima Corporation. Kajima raised its FY26 profit forecast +35.1% YoY while Obayashi's profit stayed flat, widening the gap between Japan's top contractors. Could a giant copy it? No, they are blocked.
03
What protects it. Government construction licensing, bonding capacity, and decades of proprietary building data (ODICT) keep outsiders out of Japan's contractor tier.
What would change this call
Kajima's FY26 net profit vs Obayashi's when both report full-year results. Confirms whether Kajima is durably pulling ahead in profitability, not just forecast talk.
Obayashi's order intake figures for FY26 versus the -19.6% prior decline. Shows whether the order slowdown is reversing or deepening under new CEO Sato.
Multiplex integration progress and any cost overruns disclosed post Q4 2026 close. Indicates whether the acquisition strengthens or drains Obayashi versus peers.
Obayashi's order intake figures for FY26 versus the -19.6% prior decline. Shows whether the order slowdown is reversing or deepening under new CEO Sato.
Multiplex integration progress and any cost overruns disclosed post Q4 2026 close. Indicates whether the acquisition strengthens or drains Obayashi versus peers.
Key numbers
- Net sales ¥2,586.2B in FY2026, down 0.2% YoY
- Equity ratio rose to 40.0%
- Basic EPS rose ¥202.91 to ¥249.42, +23%
Named risks
- FY2026 order guidance down 19.6% YoY signals weakening domestic pipeline.
- Multiplex integration risk given $650M deal not closing until Q4 2026.
- Profit growth lagging peer Kajima (+35.1% YoY forecast) despite flat Obayashi top line.
- Historical antitrust exposure from 2018 maglev bid-rigging fine remains a governance risk factor.
- Nine-month sales through December 2025 fell 3.6% YoY, indicating near-term revenue softness.
Rivals, as read in July 2026
| Rival | Direction | Evidence |
|---|---|---|
| Kajima Corporation | losing to | Kajima raised FY2026 net profit forecast to ¥170B (+35.1% YoY) on 2026-02-11 versus Obayashi's flat top line |
| Shimizu Corporation | contesting | Fellow 'big five' peer, also fined in 2018 maglev bid-rigging case, competes for same domestic infrastructure contracts |
| Taisei Corporation | contesting | Peer in Japan's oligopolistic big-five contractor group, similarly exposed to 2018 maglev antitrust fine |
| Takenaka Corporation | contesting | Fourth of Japan's big-five contractors, competing for the same domestic order book amid FY26 order decline |
| Multiplex (Brookfield) | gaining on | Obayashi agreed to acquire Multiplex for $650M on 2026-06-18, absorbing rather than losing to it |
Questions people ask
- Is Obayashi Corporation profitable?
- Yes. For the fiscal year ended March 31, 2026, Obayashi's basic EPS rose to ¥249.42 from ¥202.91 the prior year, even as consolidated net sales slipped 0.2% YoY to ¥2,586.2 billion, per its financial results filed May 13, 2026.
- Could AI replace Obayashi Corporation?
- No. Obayashi's business rests on licensed general-contractor status, bonding capacity, and legal liability for major infrastructure that AI cannot assume. Instead Obayashi is deploying AI itself, such as its ORCISM autonomous crane system launched May 2025, as a productivity tool, not a replacement.
- Who is Obayashi Corporation's biggest competitor?
- Obayashi competes within Japan's 'big five' general contractors: Kajima, Shimizu, Takenaka, and Taisei. Kajima is currently outperforming Obayashi on profit growth, raising its FY March-2026 net profit forecast to ¥170 billion (+35.1% YoY) as of February 11, 2026.
- Who owns Obayashi Corporation?
- Obayashi is publicly traded on the Tokyo Stock Exchange (ticker 1802) with no controlling parent. Japan's Government Pension Investment Fund is the largest disclosed institutional holder at approximately 8.52% as of March 17, 2026, while founding-family Chairman Takeo Obayashi holds about 2.46%.
- Why is Obayashi Corporation buying Multiplex?
- Obayashi agreed on June 18, 2026 to acquire Brookfield's global construction arm Multiplex for $650 million, expanding into Australia, the UK, and Canada. The deal, expected to close Q4 2026, marks a major push into English-speaking overseas construction markets.
- Has Obayashi Corporation had any legal or antitrust problems?
- Yes. Obayashi was criminally prosecuted and fined roughly $1.8 million in 2018 for bid-rigging on the Tokyo-Nagoya maglev project, alongside peers Kajima, Taisei, and Shimizu. No new antitrust litigation was reported current to 2025-2026.
Timeline
- 2026-07-14Signed MOU with Singapore's JTC on construction robotics collaboration
- 2026-06-18Agreed to acquire Brookfield's Multiplex construction arm for $650 million
- 2026-05-13Reported FY2026 net sales of ¥2,586.2 billion, down 0.2% YoY, EPS up to ¥249.42
- 2026-02-11Peer Kajima raised FY2026 net profit forecast to ¥170 billion, +35.1% YoY
- 2025-10-22Webcor (US subsidiary) agreed to acquire data-center builder GCON Inc. for ~$325 million
- 2025-05-27Deployed ORCISM autonomous crane system at East Japan Robotics Center
- 2025-04-01Toshimi Sato became President and CEO
- 2025-03-31FY2025 consolidated net sales reached ¥2,620.1 billion, up 12.7% YoY
- 2018-10-24Fined ~$1.8 million for bid-rigging on Tokyo-Nagoya maglev project
- 1892-01Founded in Osaka by Yoshigoro Obayashi
Revision history
24 July 2026
First assessed. Hard to displace. The text above is fixed as of this date and is not edited afterwards.
In the same band
Sources
- Obayashi Corp. Company Profile & Executives - WSJ (2026-03-17)
- gurufocus.com (2026-07-23)
- Obayashi Corporation (1802) Leadership & Management Team Analysis
- Dialogue Among the Chairman...
- Consolidated Financial Results for the Fiscal Year Ended March 31, 2025
- FY2025Q4financial1 (2026-05-13)
- FY2025Q3financial1 (2026-02-09)
- Webcor Buys GCON in Deal Focused on Technology Markets (2025-10-27)
- Kajima Raises Full-Year Net Profit Forecast to ¥170 Billion (2026-02-11)
- 1802 Number of Employees (2025-03-30)
- Corporate Report (Integrated Report)
- Obayashi Corporation Builds ORCISM (2025-05-27)