Mr. Sornchai Tanphairoh

Managing Director
Assurance and IFRS & TFRS and Oversea & Domestic Tax Speciallist

Sornchai is an Audit Partner at TOYO AUDIT. Prior to joining the firm, he built a distinguished career at one of Thailand’s leading top-tier audit firms.

With over 28 years of professional experience in auditing, accounting advisory, and taxation, Sornchai possesses deep expertise across a diverse range of industries.

His portfolio includes serving multinational corporations (MNCs) and Thai listed companies, where he is highly regarded for his ability to resolve complex issues and implement proactive tax strategies to mitigate risks with the Revenue Department.

As a licensed auditor with more than 20 years of experience specializing in tax reporting for multinational entities, Sornchai holds extensive expertise in both domestic and international taxation.

In addition to his core practice, he possesses in-depth knowledge of Data Analytics applied to accounting and auditing. Demonstrating his commitment to the profession, he has also served as a guest lecturer on accounting and auditing standards for numerous leading organizations in Thailand.

INDUSTRIES

• Manufacturing
• Services
• Real Estate
• Technology Services
• Construction
• Automotive
• Logistics
• Leasing
• Advertisement
• Consulting
• Trading
• Energy
• Boi License
• Hospitality

SERVIICES

• M&A
• Global Minimum Tax
• Transfer Pricing
• Initial Public Offerings (IPOs)
• Listed companies
• Audit and Assurance
• Financial Statements
• Tax Compliance
• Financial Due Diligence
• Tax Due Diligence
• Review Financial Statements Monthly report
• Internal Control
• Valuation
• Accounting & Tax compliance

QUALIFICATIONS & AFFILIATIONS

• Bachelor's Degree of Accounting
• Tax Diploma
• International Trade Diploma
• Certified Public Accountant ( CPA )
• Membership of Federation of Accounting Professions
• Registered accountant (Accounting Act 2000)

Email: Sornchai@toyo-g.com
Tel: 02-259-0061, 02-661-6118
Mobile Phone: 089-1199014

Mr. Teruaki Tanaka

Director
Certified Public Tax Accountant

INDUSTRIES

• Manufacturing
• Services
• Real Estate
• Technology Services
• Construction
• Automotive
• Logistics
• Leasing
• Advertisement
• Consulting
• Trading
• Energy
• Boi License

SERVIICES

• Global Minimun Tax
• Transfer Pricing
• Initial Public Offerings (IPOs)
• Listed companies
• Audit and Assurance
• Financial Statements
• Tax Compliance
• Financial Due Diligence
• Tax Due Diligence
• Review Financial Statements Monthly report
• Internal Control
• Valuation
• Accounting & Tax compliance

Email: tanaka@toyo-g.com
Mobile Phone JP: +81(0)8038267580 (Rakuten Mobile)
Mobile Phone TH: +66(0)958122120

Ms. Narat  Rotjanarat

Senior Manager
Assurance and IFRS & TFRS and Tax Speciallist

Narat is a specialist in audit, tax audit, and accounting and tax advisory services, with over 13 years of professional experience.

She possesses in-depth expertise in PAE and NPAE accounting standards, as well as tax laws and regulations. Her experience spans a wide range of organizations, including medium-sized and large enterprises that require a high level of accuracy, reliability, and regulatory compliance.

She is highly regarded for her ability to analyze, audit, and manage complex accounting and tax matters in a comprehensive and effective manner. With a systematic and meticulous working approach, and a strong commitment to accuracy, transparency, and strict regulatory compliance, she helps identify potential risks and provides proactive, preventive recommendations. Her work strengthens the confidence of management, auditors, and stakeholders, while supporting organizations in operating efficiently, reducing accounting and tax risks, and achieving sustainable long-term growth.

INDUSTRIES

• Manufacturing
• Services
• Real Estate
• Technology Services
• Construction
• Automotive
• Logistics
• Leasing
• Advertisement
• Consulting
• Trading
• Energy
• Boi License

SERVIICES

• Initial Public Offerings (IPOs)
• Listed companies
• Audit and Assurance
• Financial Statements
• Tax Compliance
• Financial Due Diligence
• Tax Due Diligence
• Review Financial Statements Monthly report
• Internal Control
• Valuation
• Accounting & Tax compliance

QUALIFICATIONS & AFFILIATIONS

• Bachelor's Degree of Accounting
• Tax Diploma
• Membership of Federation of Accounting Professions
• Registered accountant (Accounting Act 2000)

Email: narat@toyo-g.com
Tel: 02-259-0061, 02-661-6118
Mobile Phone: 091-0099892

Ms. Laddawan Pongpla

Senior Manager
Assurance and IFRS & TFRS and Tax Speciallist

Laddawan has over 13 years of experience in accounting and auditing across a wide range of industries, including manufacturing, service businesses, and real estate. She has strong expertise in accounting system implementation, financial statement preparation and analysis, financial data verification, as well as providing advisory services on compliance with accounting standards and regulatory requirements.

She is committed to working in a systematic, thorough, and detail-oriented manner to enhance transparency and reliability, while supporting clients’ business decision-making effectively. In addition, she works closely with teams and management to help drive organizations toward sustainable growth.

INDUSTRIES

• Manufacturing
• Services
• Real Estate
• Technology Services
• Construction
• Automotive
• Logistics
• Leasing
• Advertisement
• Consulting
• Trading
• Energy
• Boi License

SERVIICES

• Initial Public Offerings (IPOs)
• Listed companies
• Audit and Assurance
• Financial Statements
• Financial Due Diligence
• Tax Due Diligence
• Review Financial Statements Monthly report
• Internal Control
• Accounting compliance

QUALIFICATIONS & AFFILIATIONS

• Bachelor's Degree of Accounting
• Membership of Federation of Accounting Professions
• Registered accountant (Accounting Act 2000)

Email: laddawan@toyo-g.com
Tel: 02-259-0061, 02-661-6118
Mobile Phone: 083-1241145

Ms. Sasithon Ratmonti

Manager
Assurance and IFRS & TFRS speciallist

Sasithorn is an experienced auditor with 7 years of expertise across diverse industries. Her strengths lie in planning and controlling audits to meet professional standards, focusing on improving process efficiency and providing consulting services to resolve structural accounting issues for clients. She supports and manages her team with an attitude focused on accuracy and shared success.

INDUSTRIES

• Manufacturing
• Services
• Real Estate
• Technology Services
• Construction
• Automotive
• Logistics
• Leasing
• Advertisement
• Consulting
• Trading
• Boi License

SERVIICES

• Initial Public Offerings (IPOs)
• Listed companies
• Audit and Assurance
• Financial Statements
• Financial Due Diligence
• Tax Due Diligence
• Review Financial Statements Monthly report
• Internal Control
• Bookkeeping
• Payroll

QUALIFICATIONS & AFFILIATIONS

• Bachelor's Degree of Accounting
• Membership of Federation of Accounting Professions
• Registered accountant (Accounting Act 2000)

Email: sasithon@toyo-g.com

Tel: 02-259-0061, 02-661-6118

Mobile Phone: 099-4589987

Ms. Juthamat Somwung

Manager
Assurance and IFRS & TFRS speciallist

Juthamat is an audit professional with over 8 years of experience in auditing both NPAE and PAE entities. She has strong expertise in examining financial statements in accordance with Thai Financial Reporting Standards (TFRS).

Her responsibilities cover the full audit process, from audit planning and fieldwork to the preparation of audit reports in a systematic manner.

She is able to communicate complex accounting matters clearly and practically, enabling clients to make informed decisions with confidence.

She is committed to accuracy, diligence, and the reliability of financial information in all assignments under her responsibility.

INDUSTRIES

• Manufacturing
• Services
• Real Estate
• Technology Services
• Construction
• Automotive
• Logistics
• Leasing
• Advertisement
• Consulting
• Trading
• Energy
• Boi License

SERVIICES

• Initial Public Offerings (IPOs)
• Listed companies
• Audit and Assurance
• Financial Statements
• Financial Due Diligence
• Review Financial Statements Monthly report
• Internal Control
• Bookkeeping
• Payroll

QUALIFICATIONS & AFFILIATIONS

• Bachelor's Degree of Accounting
• Membership of Federation of Accounting Professions
• Registered accountant (Accounting Act 2000)

Email: juthamat@toyo-g.com

Tel: 02-259-0061, 02-661-6118

Mobile Phone: 093-5806672