Higashio MECH Co., Ltd.
Corporate brand
UnclaimedJapanese specialist manufacturer of pipe fittings for air-conditioning, plumbing, fire-fighting and gas piping, headquartered in Kawachi-nagano, Osaka.
Last updated September 26, 2026
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Overview
Higashio MECH Co., Ltd. (東尾メック株式会社) is a Japanese manufacturer of pipe fittings headquartered in Kawachi-nagano, Osaka. Founded in 1950 as Higashio Tsugite Co., Ltd. (東尾継手株式会社) by Seiichi Higashio, the company began in the field of malleable (cast iron) fittings and has since grown into a specialist maker of joints and fittings for a wide range of piping systems. It renamed itself Higashio MECH Co., Ltd. in 1989 and celebrated its 75th anniversary in 2025. The company's product range spans malleable iron fittings, epoxy- and resin-coated steel pipe fittings, anti-corrosion pipe-end fittings, stainless steel pipe fittings, resin pipe fittings, refrigerant copper pipe fittings, aluminium pipe fittings and gas pipe fittings. Its flagship brands include the KK Best stainless steel pipe fitting, the Ozzon-kun and R-Ozzon (Reiwa Ozzon) brazeless refrigerant pipe fittings, the Snap and Pikappo resin pipe fittings, the Abacus (now Soroban) stainless steel fitting, and the Pile-Fit foundation pile fitting. The company positions itself as a niche-top specialist in air-conditioning fittings, with the slogan 'Higashio MECH of air-conditioning fittings'. Higashio MECH serves the Japanese construction and building services market and has expanded overseas, including business partnerships and supply arrangements with companies such as Sekisui Chemical, Uponor, REHAU, Daikin Industries and Takasago Thermal Engineering. It has supplied fittings for markets in South Korea, the United States and Turkey. The company holds ISO 9001 and ISO 14001 certifications and has received several awards, including the Osaka Monozukuri Excellent Company Award in 2019 and selection as one of the '100 Companies Representing Kawachi' in 2025. As a privately held company, Higashio MECH remains headquartered in Kawachi-nagano and continues to develop new piping technologies, including the KK Best+ launched in 2025. It is known for its 'human-centered management' philosophy and community engagement, such as its annual Bon Odori festival.
History
Higashio MECH Co., Ltd. was founded in 1950 as Higashio Tsugite Co., Ltd. (東尾継手株式会社) in Kawachi-nagano, Osaka, with Seiichi Higashio as its first president. The company began as a manufacturer of malleable (cast iron) pipe fittings, a core product for steel pipe plumbing of the era. In 1952 it obtained JIS B 2301 approval (No. 1349) for its malleable iron fittings. During the 1960s and 1970s, the company expanded its product line in response to changes in piping technology. In 1967 it issued convertible bonds through Osaka Small and Medium Business Investment & Consultation Co., Ltd. In 1970 it launched epoxy-coated fittings for resin-lined steel pipes, addressing the social problem of red water (rust-contaminated water) from corroded steel pipes. In 1977 it introduced heat-resistant resin-coated fittings for hot-water supply lined steel pipes and entered an OEM partnership with Sekisui Chemical. In 1980 it purchased adjacent land and buildings, and Mitsutsugu Higashio became president. In the 1980s, the company continued to develop anti-corrosion solutions: outer-surface resin-coated fittings for buried pipes in 1984 and pipe-end anti-corrosion fittings to prevent red water in 1986. In 1989 the company changed its name to Higashio MECH Co., Ltd. In 1990 it issued its first secured corporate bonds, and in 1992 it launched heat-resistant pipe-end anti-corrosion fittings. In 1993 it purchased the West Warehouse land and buildings. In 1995 it received the TPM Excellence Award (Category 1). In 1998 the company registered its quality management system under ISO 9001 (JQA-2447). The year 2001 was a major turning point: it launched the Snap resin pipe fitting (a one-touch clamp-ring system) and the Abacus stainless steel pipe fitting (the world's first rolled-thread structure for stainless steel piping), and formed a business alliance with Toyo Valve Co., Ltd. In 2003 it launched the One-Lock fitting for reheating pipes and the Ozzon-kun refrigerant pipe fitting, which enabled completely flameless, safe installation. In 2004 it launched the Ozzon-kun CW-CX for new refrigerants using a rolled-groove method. In 2006 it registered its environmental management system under ISO 14001 (JQA-EM5370). In 2008 it launched the resin pipe header system, and in 2009 the Pile-Fit fitting for residential foundation piles. In 2010 it formed a business alliance with Uponor and launched the Ozzon-kun CZ refrigerant fitting. In 2011 it launched the RTM and MECHFit resin pipe fittings and the Conic Joint for refrigerant and AI pipes. In 2012 Yoshinori Inoue became president, with Mitsutsugu Higashio becoming chairman. In 2013 it launched the Lean Flange loose flange. In 2014 the Ozzon-kun received ISO 14903 third-party certification. In 2015 it launched MECHFit Pb for Korean Pb pipes. In 2016 Seigo Higashio became president; the company launched SmartClick for US resin pipes, Ozzon-kun B and S'B NUT refrigerant fittings. In 2017 it launched the KK Best stainless steel pipe fitting, the Kachitto S resin pipe fitting and the Ozzon-kun S refrigerant fitting, and received the TPM Excellence Award Category A. In 2018 KK Best won the SME Excellent New Technology/New Product Award; the company formed partnerships with REHAU (PX fitting production), Daikin Industries (ASTM copper pipe fitting GT JOINT production) and Takasago Thermal Engineering (aluminium Ozzon-kun), launched the Pikappo resin pipe fitting, began production of gas SUS flexible pipe fittings, signed a volume contract for aluminium Conic Joints with Turkey, and achieved ISO MS Integrated Program Premium Stage. In 2019 it launched the SP Lock steel pipe fitting and PX fitting, and won the Osaka Monozukuri Excellent Company Award (Best Company and Intellectual Property awards). In 2020 Daikin Industries made a capital and business alliance; R-Ozzon received ISO 14903 certification. In 2021 R-Ozzon received JCDA0012 certification, and the company launched the D flareless Joint, R-Ozzon, Quick Piper and TIGHTFIT refrigerant fittings, and the PINC resin pipe fitting for overseas markets. In 2025 the company celebrated its 75th anniversary, started TV commercials in the Kansai and Kanto regions, produced a company introduction video, and held an anniversary ceremony. It was selected as one of the '100 Companies Representing Kawachi'. In 2025 it also debuted the KK Best+ at the Osaka Kanko Kizai Fair. As of 2026, the company continues to update its product line and pricing, and remains a privately held specialist in piping fittings.
- 2013
Launched Lean Flange loose flange
- 2012
Yoshinori Inoue becomes president; Mitsutsugu Higashio becomes chairman
- 2011
Launched RTM, MECHFit and Conic Joint
- 2010
Business alliance with Uponor; launched Ozzon-kun CZ
- 2009
Launched Pile-Fit fitting for residential foundation piles
- 2008
Launched resin pipe header system
- 2006
Registered ISO 14001 environmental management system (JQA-EM5370)
- 2004
Launched Ozzon-kun CW-CX for new refrigerants
- 2003
Launched One-Lock fitting and Ozzon-kun refrigerant fitting
- 2001
Launched Snap resin fitting and Abacus stainless steel fitting; business alliance with Toyo Valve
Products and positioning
Niche-top specialist in air-conditioning and piping fittings, emphasizing safe, high-quality, labor-saving installation methods.
KK Best
Stainless steel pipe fitting launched in 2017, enabling ultra-fast, high-quality installation.
KK Best+
Enhanced version of KK Best, debuted in 2025.
Ozzon-kun
Brazeless refrigerant pipe fitting launched in 2003, enabling safe flameless installation.
R-Ozzon (Reiwa Ozzon)
Refrigerant copper pipe fitting launched in 2021, with ISO 14903 and JCDA0012 certifications.
Snap
Resin pipe fitting launched in 2001, featuring one-touch clamp-ring installation.
Pikappo
Resin pipe fitting launched in 2018.
Abacus / Soroban
Stainless steel pipe fitting launched in 2001, the world's first rolled-thread structure for stainless steel piping; later renamed Soroban.
Pile-Fit
Fitting for residential foundation piles launched in 2009.
MECHFit
Resin pipe fitting launched in 2011.
SP Lock
Steel pipe fitting launched in 2019.
Marketing campaigns
- 75th Anniversary TV Commercial
- Company Introduction Video 'Sekai ni Kirari'
Sources5 sources
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