About YHS International
HISTORY
Company Profile
YHS International Limited is a leading façade specialist and a proud member of the global YKK AP group. Beyond our international affiliation, our heritage is rooted in the pioneering evolution of Thailand’s façade industry. We have played a key role in shaping the market through the introduction of advanced façade technologies from the United States, Australia, and Japan - setting new benchmarks through early adoption and continuous innovation.
YHSI was among the first to deliver four-sided structural curtain wall systems in Thailand, as well as to introduce PVDF coating and advanced painting technologies for aluminium extrusion. We also established one of the first test chambers to evaluate curtain wall performance. Supported by an extensive portfolio of projects across Thailand, Japan, Australia, Vietnam, and Myanmar, we deliver façade solutions defined by technical excellence, innovation, and enduring quality.
TODAY
Today, YHS International Limited is proud to be part of YKK AP Inc., a global leader in architectural products with a distinguished international reputation. This affiliation provides us with deeper expertise in curtain wall systems and access to advanced technologies, further enhancing our capabilities and reinforcing our leadership within the façade industry.
Strengthened by the global foundation of YKK AP and complemented by the proven capability of one of Thailand’s most established façade specialists, YHS International represents a uniquely powerful partnership that seamlessly integrates international excellence with precise local execution. This balance ensures accountability, reliability, and results you can trust, enabling us to consistently deliver a superior level of completeness, confidence, and project success as a leading façade partner in Thailand and across the region.
At YHS International, we believe façade construction goes beyond merely completing a project; it is the realization of a truly successful outcome. Every project reflects our commitment to performance, precision, and enduring value.
OUR PHILOSPHY
WE ARE COMMITTED TO ACHIEVING THE HIGHEST LEVEL OF CUSTOMER SATISFACTION THROUGH THE DEVELOPMENT OF QUALITY PRODUCTS AND RELIABILITY IN EVERY PROCESS.
CYCLE OF GOODNESS
No one prospers without rendering benefit to others.
As an important member of society, a company survives through coexistence. When the benefits are shared, the value of the company’s existence will be recognized by society. When pursuing his business, YKK’s founder, Tadao Yoshida, was most concerned with that aspect, and would find a path leading to mutual prosperity. He believed that using ingenuity and inventiveness in business activities and constantly creating new value would lead to the prosperity of clients and business partners and make it possible to contribute to society. This type of thinking is referred to as the CYCLE OF GOODNESS, and has always served as the foundation of our business activities. We have inherited this way of thinking, and have established it as the YKK philosophy.
CORE VALUE
At YHS International, our B.E.L.I.E.F.S. guide everything we do—driving balance, excellence, and leadership through innovation. We act with integrity, stay focused on customer satisfaction, and are committed to sustainability for a better future.
ORGANIZATIONAL CHART
BOARD OF DIRECTOR
Mr.Kazuhiro Kitano
Senior Vice President,YKKAP
Mrs. Sarinee Ang
Managing Director
Mr. Kimitoshi Goto
International Business Director
Mrs.Tassanee Rodboonpha
Director of Accounting & Finance
Ms. Photjanee Assavabenya
Operation Director
Ms. Photjana Assavabenya
Estimating Manager
KEY OF MANAGEMENT
Mr. Kimitoshi Goto
International Business Director
Ms. Photjanee Assavabenya
Operation Director
Mr. Takafumi Tani
Director Design
Mr. Christayos Rodboonpha
Local Sales & Estimation Director
Mr. Chanasin Jongtiamkan
Deputy Director
Mr.Peerapol Thaweekul
Project Director Group3
Mr. Tetsuya Yamada
Division Manager
Mr. Ryuji Tanaka
General Manager
Mrs.Jinda Unjit
Design Manager
OUR FACTORY
Company Profile
SIAM METAL COMPANY LIMITED is a key manufacturing arm under YHS International Limited, specializing in the production of high-quality façade and glass systems for leading organizations across Thailand and the region.
With a strong foundation in engineering excellence and advanced manufacturing, SIAM METAL plays a vital role in supporting the delivery of world-class curtain wall solutions. Our production capabilities are designed to meet the highest standards of precision, durability, and performance—ensuring that every component contributes to the success of complex architectural projects.
Backed by the expertise and legacy of YHS International, we integrate modern technologies and strict quality control processes throughout every stage of production. From material selection to fabrication and assembly, our operations are driven by a commitment to reliability, consistency, and innovation.
Our products are trusted in a wide range of high-profile developments, reflecting our ability to deliver at scale while maintaining exceptional quality. As part of the YHS ecosystem, SIAM METAL continues to strengthen its role in advancing façade manufacturing in Southeast Asia—supporting sustainable growth and setting new benchmarks in the industry.
ESG & Sustainability
At YHS International, sustainability is embedded in our DNA. Guided by our B.E.L.I.E.F.S. values, we are committed to creating long-term value for our customers, communities, and the environment. Through innovation, responsible practices, and high-quality façade solutions, we support sustainable architecture and a better future for generations to come.