NHK Precision Co., Ltd.

NHK Precision Co., Ltd. (日発精密工業株式会社) is a Japanese precision-parts manufacturer based in Isehara, Kanagawa. Its history traces to 1958, when Nippon Hatsujo Co., Ltd. and Nakashimada Tekkosho Co., Ltd. merged to establish Nippon Kanshoki Co., Ltd. for the production of automotive shock absorbers. The company later diversified, changing its name to Nisshin Seiki Co., Ltd. in 1965 and to Nisshin Seiko Co., Ltd. (日発精密工業株式会社) in 1972 following a merger with Nippon Template Co., Ltd. Its product lines have included cross-recessed screw forming punches, motorcycle brake discs, gas lifters, TORX products, power-steering vanes, optical fiber connectors, magnetic disk substrates, turret punch dies, coated punches, and automatic transmission disc springs. The company operates the Isehara Plant and the Yokote Plant in Yokote City, Akita Prefecture, and has overseas operations in Thailand, Indonesia, and China. In 2003 it was delisted and became a wholly owned subsidiary of Nippon Hatsujo Co., Ltd.

In 1958, Nippon Hatsujo Co., Ltd. and Nakashimada Tekkosho Co., Ltd. merged to establish Nippon Kanshoki Co., Ltd., which began operations with the purpose of producing automotive shock absorbers (capital of 5 million yen). In 1965, responding to product diversification, the company changed its name to Nisshin Seiki Co., Ltd. and increased capital to 50 million yen. In 1966 it began production of forming punches for cross-recessed screws. In 1971 it established the Yokote Plant in Yokote City, Akita Prefecture, and began production of motorcycle brake discs. In 1972 it merged with Nippon Template Co., Ltd. and changed its name to Nisshin Seiko Co., Ltd. (日発精密工業株式会社), increasing capital to 80 million yen. In 1973 it established the Isehara Plant in Isehara City, Kanagawa Prefecture, and increased capital to 160 million yen. In 1974 it relocated its head office to the Isehara Plant in Isehara City, Kanagawa Prefecture, and began production of gas lifters and TORX products. In 1975 capital was increased to 300 million yen. In 1982 it began production of power-steering vanes; in 1983, optical fiber connectors; in 1986, magnetic disk substrates; and in 1988, turret punch dies and coated punches using the CVD method. In 1989 it began production of disc springs for automatic transmissions. In 1990 its shares were listed on the over-the-counter market and capital was increased to 1,404.75 million yen. In 1991 it began production of gas stays. In 1994 it established NHK PRECISION (THAILAND) CO., LTD. In 1998 it obtained ISO9002 certification for the manufacture of optical fiber connectors. In 2001 the Isehara Plant's automotive parts obtained ISO9002 certification, and the Yokote Plant changed its ISO9002 scope to motorcycle brake discs and power-steering vanes. In 2003 the Isehara Plant's automotive parts obtained ISO9001:2000 transition certification, and the Yokote Plant obtained ISO9001:2000 transition certification for screw tools, automotive parts, information-processing equipment parts, and industrial precision parts; the company was delisted and became a wholly owned subsidiary of Nippon Hatsujo Co., Ltd. In 2004 it relocated its head office to Numama, Isehara City, Kanagawa Prefecture. In 2006 the Yokote Plant obtained ISO14001 certification, and in 2007 the Isehara Plant obtained ISO14001 certification. In 2008 it celebrated its 50th anniversary. In 2009 it reduced capital to 480 million yen. In 2012 it established PT. ASTRA NIPPON NHK PRECISION (Indonesia) as a joint venture with PT. ASTRA NIPPON GASKET INDONESIA, and established Hangzhou Nisshin Hatsu Metal Products Co., Ltd. (China). In 2016 NHK PRECISION (THAILAND) CO., LTD. relocated. In 2023 PT. NHK PRECISION PARTS INDONESIA relocated its head office plant. In 2025 Hangzhou Nisshin Hatsu Metal Products Co., Ltd. (China) relocated its head office plant.

Precision manufacturing built on the integration of heat treatment/surface treatment, plastic working, and polishing/grinding technologies.

• Screw-forming tools

• Automotive parts

• Industrial precision parts

• Motorcycle brake discs

• Gas lifters and gas stays

• TORX products

• Power-steering vanes

• Optical fiber connectors

• Magnetic disk substrates

• Turret punch dies

• Coated punches

• Automatic transmission disc springs

1. 1日発精密工業株式会社nisseiko.co.jp
2. 2日発精密工業株式会社 | 沿革nisseiko.co.jp