What we do

Circle Field Associates is an independent professional firm (regulated by RICS)  established in 2015, with offices in London UK and Japan.

We are specialised in strategy, management and dispute resolution within Land, Property, Construction and Heritage sectors.

We provide top-quality advice and wide-range support for both local and international projects, representing investors, developers, contractors and consumers, to create environment for the people to work and live better.

Japanese language-日本語案内はこちらをどうぞ






We are a RICS chartered surveying firm based in London.
We provide independent advice on strategy, management and dispute resolution for domestic and International investors, developers, construction companies and consumers on investment, development, construction and heritage projects in UK, Europe, Middle East, Asia and Japan through our strong network of worldwide business partners.


1.Strategy and Management 

-Strategy research, report and advice

-Investment, Development, Project, Construction management



2.Dispute resolution 

– Expert witness


Building surveying

Construction-Cost & Delay

Heritage & Conservation

International Standards on measurements


– Arbitration, Construction adjudication and Expert determination



3. Specialist scope

1. Reginal, Market and Industry research

2.Feasibility and development study

3.Organisation analysis

4.Planning, Design and Technology

5.Contract management

6.Programme, Quality, Cost and Risk control

7.Building survey reports and pathology

8.Valuation reports

9. Heritage and Conservation reports

10 International Standards on Ethics, Property and Construction



Who we are



Tel: +44-77-1186-0911
E-mail: koji.tanaka@circlefield.com

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Based in the UK and Japan, Dr. Koji Tanaka is a specialist in the area of strategy, management and dispute resolution, providing independent advice and report on strategy, management, expert witness, arbitration, construction adjudication and expert determination for both domestic and international projects and stakeholders.   

He is a member of RICS, RIBA, CIArb, JIA, and drafting member of International Standards-IPMS, ICMS and IES.


RICS Registered Valuer  5625861
Royal Institute of Chartered Surveyors (registered in 2011).  FRICS. 5625861
Royal Institute of British Architects (registered in 2011).         RIBA.  20004806
Chartered Institute of Arbitrators (registered in 2010).            MCIArb. 27497
The Japan Institute of Architects                                                         JIA 1001884                                       

CV-Koji Tanaka(ENG)

Profile- LinkedIn



UK Office

Circle Field Associates Limited

– Registered as a firm regulated by RICS . No 780154


Address: 31 St Mildreds Road, London, UK, SE12 0RD

E-Mail: info@circlefield.com

TEL (Desk): +44-(0)20-8851-6052

TEL (HP): +44-(0)77-1186-0911


Airport: Taxi for 20 minutes from the City Airport

Tube:      Taxi for 20 minutes from Canary Wharf

Train:      Train for 20 minutes from London Bridge Station, Charing Cross                                   Station to Lee station South Eastern Railway.

Walk:      Walk for 5 minutes from Lee Station to the opposite corner of St                                  Mildred Church.


Japan Office

Circle Field Associates First Class Architect

– Registered as a first class architect office.  No. 2020 HA 2262


Address: 12-2 Kita Koriyama, Yamato Koriyama City, Nara, Japan, 639-1160

E-Mail: info@circlefield.com

TEL(Desk): +81-(0)743-53-1438

TEL(HP): +44-(0)77-1186-0911


UAE & Singapore Liaison Office

Please contact UK Office for details