Shape Form　Reveal Essence

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2026.04.25Notice
KOYAMA CONSTRUCTION official website now live.
2026.02.20Company
KOYAMA CONSTRUCTION Co., Ltd. established.

Translating the essence of design into unshakable reality

KOYAMA CONSTRUCTION was established to integrate the profound practical wisdom cultivated in constructing international luxury spaces with Japan's rigorous construction standards. With a supply chain meticulously managed from its origins and uncompromising precision, we materialize the designer's vision without the slightest dilution, building pure spaces that withstand the test of time.

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WorksGroup Projects
Waldorf Astoria Xiamen
#Hospitality

Waldorf Astoria Xiamen

The Ritz-Carlton, Xi'an
#Hospitality

The Ritz-Carlton, Xi'an

Yuwell Group Headquarters, Nanjing
#Corporate

Yuwell Group Headquarters, Nanjing

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ServicesWhat We Do

New Construction

New Construction

Interior finishing for newly built hotels, commercial facilities, and office buildings. Precise execution to drawings, rigorous QA, faithful translation of design intent.

Renovation

Renovation

Retrofit and renewal of existing facilities. Tight scheduling allows construction to proceed with minimal disruption, even on operating sites.

Building Materials Import

Building Materials Import

Leveraging China's abundant natural-stone resources and processing capacity, we import and distribute curated marble into the Japanese market. Through the SEGACN group procurement network, quality-controlled material is supplied at competitive prices with stable lead times. For designers, contractors and developers of hotels, commercial facilities and residences — from sample fulfilment to custom fabrication.

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