Affiliated companies

Address:Shoei Nihonbashi Honcho Bldg. 3-8-5 Honcho, Nihonbashi, Chuo-ku, Tokyo 103-0023 Japan

TEL:+81-3-5643-5651/FAX:+81-3-5643-5652

PSK plans, designs, manufactures, sells and leases construction equipments and materials. PSK provides service including engineering, operation and utilization of equipments using its specialized resources.

Address:2-1-3 Higashitabata, Kita-ku, Tokyo 114-0013 Japan

TEL:+81-3-5692-4825/FAX:+81-3-3893-0929

Newtech Kowa provides comprehensive maintenance and renewal of structure including survey, diagnosis, design and construction works such as strengthening, replacement, retrofit and deterioration prevention.

Address:Harumi center Bldg. 3F, 2-5-24, Harumi, Chuo-ku, Tokyo 104-8215, Japan

TEL:+81-3-6385-9025/FAX:+81-3-3533-9925

PS Concrete inherits technology and know-how of PS Construction's long time experience and provides a variety of quality prestressed precast concrete products at its specialized factories.

Address:2-1-3 Higashitabata, Kita-ku, Tokyo 114-0013 Japan

TEL:+81-3-6386-3101/FAX:+81-3-3809-3022

Ryoken Corporation provides a variety of services including sale and lease of construction equipments and materials, real estate , insurance brokerage and travel agency business. It backs up the group's business.

Address:NK Bldg. Shin-Otsuka, 5-7-12 Otsuka, Bunkyo-ku, Tokyo 112-0012 Japan

TEL:+81-3-6912-6334/FAX:+81-3-5956-1255

Ryoken Kiso is a foundation engineering and construction company. Ryoken Kiso pursues new development and environmentally friendly methods including "Tsubasa Plie" and "HYSC Pile".

Jl. Raya Cikarang Cibarusah No. 99 Sukaresmi - Cikarang Selatan Bekasi 17550 Indonesia

TEL:62-21-897-5558/FAX:62-21-8990-6762

PT. KOMPONINDO BETONJAYA (KOBE) is the company providing manufacturing and sales services of prestressed concrete. Various precast products including PC pile, PC corrugated sheet, and U-shaped girder are introduced in Indonesia by the company. Since its establishment more than 20 years ago, KOBE has been significantly contributing to infrastructure development of Indonesia and the neighbouring countries.