-1954
MTP Kasei Co.

-1956
Production of polyethylene pipe "Aipoly" begins.

-1957
Production of electric power sheathing covers begins (world's first)

-1961
Began production of "Foam Edge," a soft polyurethane foam water supply freeze prevention heat insulator, through a technical alliance with Sterling Alderfer of the U.S. (first one-touch type heat insulator tube in Japan)

-1966
Inoac Jyukankyo begins operations as a special materials division of MTP Kasei Co.

-1969
KVS of Germany introduced equipment and began production of rigid polyurethane foam thermal insulation material "Pipe Guard" (first in Japan).

-1971
Began production of polyethylene foam heat insulator "Light Cover

-1973
Began production of polyethylene foam heat insulation material "Light Tube" using extrusion method (first extrusion-molded heat insulation tube in Japan)

-1975
（Aixin Corporation, the predecessor of Inoac Jyukankyo Co. Began production of Aipotube S, an integrated pipe coated with medium foamed polyethylene insulation and copper tubing using the extrusion method

-1980
Inoue MTP Co., Ltd. is established as a new company through the merger of MTP Kasei Co.

-1981
Began production of isocyanurate foam heat insulator "Pipe Guard Nurex" (world's first)

-1983
Name changed to Housing Equipment Division

-1984
Began production of Aipotube A type coated copper tubes for air conditioners.

-1988
Production of cross-linked polyethylene pipes, Aipoly XL (currently Oyupoly), begins

-1989
Began production of Aipotube ASK, coated copper tubing for air conditioners / Began sales of Flare-Man, an electric flaring tool for air conditioners (the world's first electric flaring processing tool)

-1990
Company name changed to INOAC Corporation / In-situ foamed lightweight urethane embankment method developed (world's first)

-1991
Began production of "Clean Duct," a decorative case for air conditioner piping

-1992
Began production of hot-water floor heating system "On-Oh" (Japan's first folding wooden hard panel) / Began production of "Onsen Pipe", a composite of cross-linked polyethylene pipe, thermal insulator and protection pipe

-1996
Began production of polyethylene foam heat insulator "Light Cover" at Kabinburi Plant (INOAC INDUSTRIES THAILAND CO., LTD.) in Thailand

-1997
Began production of Aipotube A type coated copper tube for air conditioning at Kabinburi Plant (INOAC INDUSTRIES THAILAND CO., LTD.) in Thailand

-1998
Began production of "Saya-Poly," a sheath tube for optical cables.

-1999
Began production of Oyu-Poly Tube, a cross-linked polyethylene pipe coated with water and hot water supply.

-2000
Name changed to Jyukankyo Division ISO9001 certification acquired

-2001
ISO 14001 certification acquired

-2004
Shifted to the Jyukankyo Company with the introduction of the company system. Began overseas production of hot-water floor heating panels. Began production of U-Polypipe pipes for ground heat exchange systems (first in Japan).

-2005
Started production of air conditioner piping decorative case "Clean Duct LV"/ Began production of scratch-prevention pipes "polyethylene-coated pipes for water supply

-2006
Started sales of fireproof pack "Hollow Wall Kit"/ Commenced production of high-efficiency floor heating mats "DEK Series"/ Commenced marketing of "Aipolyguard", composite pipes for bridges and freeze-prevention composite pipes

-2007
Started sales of aluminum composite cross-linked polyethylene pipe "Oyu Poly MP Tube"/ Production of solvent penetration prevention pipe "Polyethylene solvent penetration prevention coated pipe for water supply" begins.

-2008
Jyukankyo Company spun off from INOAC Corporation and merged with Aixin Co. Ltd. and merged with Aishin Corporation. Direct management of the Jyukankyo manufacturing division from Tohoku Inoac's Kogashida Plant. Direct management of the Jyukankyo manufacturing division from the Kyushu Inoac Ariake Plant. Began sales of "Fusion Fusion Kimi," a fusion bonding tool for heat insulator (polyethylene foam) for air-conditioning coated copper pipes (first in Japan)/ Started nationwide sales of "OA Floor," a flooring material sold by Aixin Co.

-2009
Commenced marketing of "EF joint for water supply", a fitting for polyethylene double-layer pipes for water supply/ Started sales of one-touch joint "At Joint" for Oyu-Poly MP.

-2010
OA floor - "NeoFOSPA" goes on sale.

-2011
Started sales of cross-linked polyethylene pipes "Hotpex" for hot water supply

-2012
Commenced production of high-performance polyethylene double-layer pipe "AIPOLY BROADPIPE

-2013
Merged with Inoac Special Materials Co.

-2014
Increased capital from 40 million yen to 90 million yen/. Started sales of aluminum refrigerant pipes "CONIC JOINT" for overseas markets.

-2015
Ibigawa Office Established in Ibigawa-cho, Ibi-gun, Gifu Prefecture / Direct Management of East Japan Inoac's Housing and Environment Manufacturing Division

-2016
Celebrating the 50th anniversary of the start of business/ Production of polyethylene pipes started at Sumikankyo's first directly-managed overseas plant (Tangerang, Indonesia). Received the Minister of the Environment's Commendation for Global Warming Prevention Activities for our geothermal heat utilization spiral heat exchanger.

-2017
Commenced production of cross-linked polyethylene pipe "Oyu-Poly Tube UP" with excellent weather resistance and two-layer specifications/ Commenced production of piping heat/cold insulator "Premium Series", "Pipe Guard Premium", "Light Cover Premium", and "Repair Cover

-2018
Production of "Oyu-Polysmart Tube" with less winding habit and improved workability started/ Began production of NP-75A , NP-95A free-access floors.

-2019
(IPI) established ICMI, a branch company of the housing and environment division, and started production of "Drain Hose LIGHT II" for packaged air-conditioner drain-up piping.

-2020
Launch of "T-FIT Crean" and "T-FIT Hygiene," high-performance heat insulators for clean rooms/ Development of "Flat U-Polypipe" as a result of commissioned work by the New Energy and Industrial Technology Development Organization (NEDO). Started sales of plastic heat exchanger "G-HEX

-2021
Experience-type showroom "INOAC HOME" opens (Anjo City, Aichi Prefecture)/ High-performance rigid polyurethane foam heat insulator "PIPEGUARD AG" begins production. Started production of "Impact Lock" fittings for O2 block. Pipe heat insulation material (polyethylene foam) "Light Cover White Type" begins sales / Joint heat insulation cover "Light Joint HC" begins sales

-2022
Moved from Kawada Technical Center to Jono Technical Center Started sales of "Sound Muffler Cover II", a sound deadening material for drainage water in residences

-2023
Polypipe dedicated fittings IN Joint/ Oyu-Poly Smart Corrugate / Oyu-Poly Smart Corrugate / Oyu-Poly Smart Corrugate Started sales of fire sprinkler piping for general construction

-2024
AIPOLY Broad Pipe with Blue Line (Class 3 Pipe)/ Launched AIPOLY Heat Flex hot spring draw-off transport pipe