What we do




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 and construction projects in London, EMEA and overseas through our strong network of worldwide business partners.


1.Strategy and Management 

-Strategy and management research, report and advice

-Development, Project, Construction Management


2.Dispute resolution 

– Expert witness


Building surveying

Construction-Cost & Delay

Planning & Development



– Arbitration

– Construction adjudication

– Expert determination



Specific fields covered by either management or specialist services

Intelligence and security research/report/advice

Market and industry research/report/advice

Organisation design and professional appointments

Professional, contractor and supplier liability

Project monitoring & audit

Planning & Design


Quality control

Contract drafting

Contract administration


Building survey

Development appraisal

Cost estimate

Feasibility study

Risk assessment




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 management and dispute resolution, providing independent research/report/advice, arbitration awards and expert witness reports 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
Royal Institute of Chartered Surveyors (registered in 2011). FRICS
Royal Institute of British Architects (registered in 2011). RIBA
Chartered Institute of Arbitrators (registered in 2010). MCIArb
The Japan Institute of Architects


Academic career

2021: Doctor of Philosophy (Engineering) – Kyoto University. PhD
2012: Bachelor of Law – The University of London, Law School. LLB(Hons)
1994/1992: Master and Bachelor of Engineering – Kyoto University.


Professional career

2015- Current      Circle Field Associates Limited
2008-2015    Mitsui Fudosan UK
1994-2008    Shimizu Corporation(Japan, Singapore, Dubai, UK)


Major articles and publishes
・International Property Measurement Standards (Co-author)
・International Construction Measurement Standards (Co-author)
・International Ethics Standards (Co-author)


・English                                    ・Japanese                                   ・Chinese (Mandarin)


Specialist area                                                                                                                            ・Strategy and management advice                                                                            ・Expert witness                                                                                                                    ・Arbitration
・Construction adjudication                                                                                            ・Expert determination

CV-Koji Tanaka(ENG)

Profile- LinkedIn



UK Office

Circle Field Associates Limited

– A member of RICS, Registered Valuer (5625861)

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

– A member of JIA, Registered Architect(292092)

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