Company ProfileAbout Us

Company profile

Company name
Polyplastics Co., Ltd.
May 4, 1964 (Founded on June 26, 1962)
Head office
JR Shinagawa East Bldg., 18-1, Konan 2-chome, Minato-ku, Tokyo 108-8280, Japan
Phone / Fax no
Phone: +81-3-6711-8600,
Fax: +81-3-6711-8606
Toshio Shiwaku, President and CEO
3 billion yen

DAICEL CORPORATION (Shareholding 100%)

Manufacturing and selling of various types of engineering plastics and polymers
  • Acetal copolymer (POM)
  • Polybutylene terephthalate (PBT)
  • Polyethylene terephthalate (PET)
  • Liquid crystal polymer (LCP)
  • Polyphenylene sulfide (PPS)
  • Cyclic olefin copolymer (COC)
Net sales (consolidated)
169,762 million yen (2021)
Number of Polyplastics
Group Employees
2,239 (March 2022)


Yoshimi Ogawa
Executive Consultant
Toshio Shiwaku
Representative Director and President
Kazuya Kurosawa
Representative Director
Yasuhiro Sakaki*
Yoshihiro Komachi*
Yuki Yoneda
Corporate Auditor
Yuji Iguchi
Corporate Auditor (part-time)
Chizuko Yamamoto*
Outside Corporate Auditor

Toshio Shiwaku

Responsible for Internal Audit Dept.

Vice President

Kazuya Kurosawa

Responsible for Supply Chain Div., Innovation and Business Development Div. and Daicel Group collaboration

Managing Executive Officer

Tohru Katsumata

General Manager of Research and Development Div., Responsible for Quality Assurance Dept., and Intellectual Property Dept.

Managing Executive Officer

Masaaki Nakamura

General Manager of Supply Chain Div.

Managing Executive Officer

Kohji Ohishi

General Manager of Production Div., Chief of Production Technology Center, Respontible for PTW, PAP, LCPG, PolyplaService Co., Ltd. and Safety and Environment

Managing Executive Officer

Hiroyuki Yazawa

General Manager of Marketing and Sales Div., Chief of Japan Business Unit, Responsible for Selling Affiliates

Executive Officer

Mitsunori Matsushima

General Manager of Innovation and Business Development Div.

Executive Officer

Keisuke Gotoh

General Manager of Corporate Strategy Div., Responsible for TAP and AMPL

Executive Officer

Noriyuki Taki

General Manager of Greater China Business Unit, Marketing and Sales Div.

Executive Officer

Shoji Sanada

Chief of Production Center, Production Div., Representative Director of PTM Holdings, Inc., Chairman of PTM Engineering Plastics (Nantong) Co., Ltd., and Responsible for PNL

Executive Officer

Makoto Nakajima

General Manager of Corporate Support Div., Responsible for Risk Management and Corporate Compliance


Akihiro Izuka

Assistant General Manager, Performance Materials Headquarters


Masanori Sakano

Deputy General Manager of Marketing and Sales Div.

Effective on April 1, 2021

*Outside Director

Note: Abbreviated names for overseas group companies

Abbreviation, Official company name Location of Head Office
PTM: PTM Engineering Plastics (Nantong) Co., Ltd. China/Nantong
PNL: Polyplastics (Nantong) Ltd. China/ Nantong
PAP: Polyplastics Asia Pacific Sdn. Bhd. Malaysia/ Kuala Lumpur
PTW: Polyplastics Taiwan Ltd. Taipei
LCPG: LCP Leuna Carboxylation Plant GmbH Germany/ Saxony-Anhalt
TAP: TOPAS Advanced Polymers GmbH Germany/ Raunheim

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