Idemitsu NTG Co., Ltd.

Idemitsu NTG Co., Ltd. is a Japanese specialty manufacturer of petroleum products, describing itself as a dedicated maker of specialty petroleum products such as greases, heat-treatment oils, and viscometer calibration standard liquids. Its product lineup includes greases, heat-treatment oils, metalworking fluids, rust-preventive oils, and viscometer calibration standard liquids. The company was founded in 1941 (Showa 16) as Nippon Special Grease Co., Ltd. and renamed Idemitsu NTG Co., Ltd. in 2025 (Reiwa 7). It is headquartered in Kawasaki, Kanagawa, and Idemitsu Kosan Co., Ltd. became its major shareholder in 2019 (Reiwa 1).

The company was founded in 1941 (Showa 16) as Nippon Special Grease Co., Ltd. (日本特殊グリース株式会社), headquartered in Osaka, when Asahi Oil Co., Ltd. (now Idemitsu Kosan Co., Ltd.) acquired and integrated the businesses of grease industry association members in eastern and western Japan, starting production of specialty greases at seven plants. In 1944 (Showa 19) a Taiwan plant began operation; in 1945 (Showa 20) production halted at all plants due to war damage; and in 1949 (Showa 24) the Kobe, Hiroshima, and Moji plants were restored and operations resumed, with sales bases opened in Tokyo, Nagoya, Osaka, Kobe, Hiroshima, and Fukuoka after controls were abolished. In 1951 (Showa 26) the company changed its name to Nippon Grease Co., Ltd. (日本グリース株式会社). In 1959 (Showa 34) it took over Showa Oil Co., Ltd.'s Hikoshima grease plant and began operating it as the Shimonoseki Plant, closed the Hiroshima Plant, and built new plants for metalworking oils and heat-treatment oils at the Kobe Plant. In 1970 (Showa 45) it received the site of Showa Oil's Hikoshima oil tank station and relocated the Shimonoseki Plant there. In 1973 (Showa 48) it began operating a lubricating oil blending plant built within Showa Oil's Osaka oil tank station as the Osaka Lubricating Oil Storage. In 1978 (Showa 53) the lithium plant at the Kobe Plant began operation; in 1980 (Showa 55) associated company Tozai Lube Center Co., Ltd. was established; in 1982 (Showa 57) a new dust-free grease plant at the Kobe Plant began operation; and in 1988 (Showa 63) it began operating Showa Shell Sekiyu K.K.'s Tsurumi grease plant as its Yokohama Plant. In 1989 (Heisei 1) it joined the U.S. Grease Association and installed a multi-plant at the Shimonoseki Plant; in 1990 (Heisei 2) it established a new company name and logo; in 1991 (Heisei 3) it added a dust-free grease plant at the Kobe Plant; in 1995 (Heisei 7) it obtained ISO9001 certification; in 1998 (Heisei 10) it began manufacturing and selling viscometer calibration standard liquids; in 1999 (Heisei 11) it opened a Thailand representative office; in 2002 (Heisei 14) it relocated and newly built its Technical Research Laboratory; in 2005 (Heisei 17) it obtained ISO14001 certification; in 2006 (Heisei 18) it added a dust-free grease plant at the Kobe Plant and relocated its head office and Osaka Branch from Kita-ku Chayamachi to Chuo-ku Minamisenba; in 2011 (Heisei 23) it opened a Shanghai representative office; in 2012 (Heisei 24) it integrated the Hiroshima and Fukuoka sales offices to open the West Japan Sales Office in Minami-ku, Hiroshima; in 2013 (Heisei 25) it relocated the West Japan Sales Office to Chuo-ku, Fukuoka and renamed it the Kyushu Sales Office, renamed the Tokyo, Nagoya, and Osaka branches to East Japan Branch, Chubu Sales Office, and West Japan Branch respectively, and established a local sales subsidiary PT NTG INDONESIA in Indonesia; in 2014 (Heisei 26) it relocated its head office and East Japan Branch to Tsurumi-ku, Yokohama (part of the head office's overseas sales department and administration department did not relocate and continued as the Osaka head office) and closed the Shimonoseki Plant; in 2017 (Heisei 29) it renamed the Chubu Sales Office to Chubu Branch; in 2019 (Reiwa 1), following the parent company's business integration, Idemitsu Kosan Co., Ltd. became a major shareholder; in 2023 (Reiwa 5) it relocated its head office and East Japan Branch from Tsurumi-ku, Yokohama to Saiwai-ku, Kawasaki (the head office standards room did not relocate); in 2025 (Reiwa 7) it changed its name to Idemitsu NTG Co., Ltd.; and in 2026 (Reiwa 8) it relocated the Chubu Branch from Naka-ku, Nagoya to Nakamura-ku, Nagoya.

Specialty manufacturer of specialty petroleum products, pioneering in three technologies: greases, heat-treatment oils, and metalworking fluids.

• Greases

• Heat-treatment oils

• Metalworking fluids

• Rust-preventive oils

• Viscometer calibration standard liquids

1. 1出光NTG株式会社idemitsuntg.com
2. 2沿革 | 出光NTG株式会社idemitsuntg.com
3. 3会社案内 | 出光NTG株式会社idemitsuntg.com
4. 4当社ビジョンについて | 出光NTG株式会社idemitsuntg.com