- November 1971
- Company is founded with capital of 3.5 million yen. Engages mainly in flexible tube and bellows installation work.
- November 1973
- Company is established as Nangoku Kogyo Co., Ltd. with capital of 5 million yen.
- March 1975
- Capital is increased to 10 million yen.
- May 1976
- Capital is increased to 16 million yen.
- April 1977
- Company changes name to Nangoku Flexible Hose Industry Co., Ltd. to improve its image as a specialized manufacturer of flexible tubes and bellows.
- December 1977
- To cope with an increase in user demand, Plant No. 2 is created and a system for speedy delivery of all products is completed.
- August 1978
- Four wire braiding machines are installed.
- January 1985
- About 760 square meters of land is purchased for Plant No. 2.
- March 1986
- Flexible tube joint type certification is acquired in conformance with Notice No. 20 of the Office of Hazardous Materials Regulation.
- April 1986
- Development of vibration-proof joint (NK-6300) conforming to specifications of Ministry of Construction (now Ministry of Land, Infrastructure, Transport and Tourism).
- June 1986
- Two wire braiding machines are added.
- August 1986
- Development of expansion joint with weld-free structure (NK-7300).
- September 1986
- Flexible tube is approved by Nippon Kaiji Kyokai.
Development of automatic argon welders (20 installed).
Development of flexible tube with weld-free joint (new product). - April 1987
- Company is accredited as designated manufacturer of products designated by Osaka prefectural government’s construction bureau.
- May 1989
- New Plant No. 2 facility is constructed.
- October 1991
- Plant No. 3 opens.
- April 1993
- Plant No. 4 opens.
- May 1993
- Company joins Zenkoku Rasenkan Kogyo Kyokai (a Japanese association of threaded pipe manufacturers).
- December 1993
- Flexible tubes for pressurized water supply equipment are certified under Notice No. 199 of the Fire Prevention Division.
- October 1994
- Release of clean tubes.
- March 1996
- Plant No. 5 opens, and two bulge forming machines (12B max. and 5B) are installed.
- January 1997
- Release of NK-7800 (Super 10/20).
- February 1997
- Expansion bellows forming machine (2,000 mm diameter) is installed.
- March 1997
- Japan Water Works Association type approval is received for 20 to 50 A water supply equipment (flexible joints).
- December 1997
- Long pipe maker (8B max.) is installed.
- February 1998
- Quality Control Section is created.
- December 1998
- 128-stroke wire braiding machine is installed. Pipe maker is installed for products of 0.2 to 0.5 mm thickness.
- July 1999
- Distribution Center opens.
- March 2003
- Tokyo Sales Office opens.
- July 2003
- Chubu Sales Office opens.
- May 2006
- Masaki Yokomakura is appointed President & Representative Director.
- March 2008
- Osaka Sales Office opens.
- March 2008
- Nakamachi Plant opens.
- March 2010
- Company becomes ISO 9001-certified.
- April 2010
- Plant No. 8 opens.
- April 2011
- Kitamachi Plant opens.
- April 2011
- Hydroforming machine is installed at Kitamachi Plant.
- June 2012
- Release of fire safety-rated PG2 and PG3 flexible hoses.
- July 2012
- Kyushu Sales Office opens.
- July 2012
- Large pipe maker is installed at Kitamachi Plant.
- April 2013
- Headquarters warehouse opens.
- August 2013
- Plant No. 4 is incorporated into Kitamachi Plant and Plant No. 8.
- October 2013
- PTFE tube expander is installed at Plant No. 8.
- December 2013
- Release of fire safety-rated CT-2 flexible hose.
- February 2014
- Plant No. 3 is incorporated into Kitamachi Plant.
- May 2014
- Bulge forming machine (14B max.) is added at Kitamachi Plant.
- July 2014
- Tohoku Sales Office opens.