The iron & steel plant was first founded as a department in The Siam Cement. The casting department was separated from Siam Cement Group in 1977 to be a newly company named The Siam Nawaloha Foundry (SNF) which had continuously expanded its casting facilities to the newly iron casting foundry named The Nawaloha Industry (NIC) in 1990 and The Nawaloha Foundry Bangpakong (NFB) in 1995. However, NFB was closed since 1999 due to the 1997 Thailand economic crisis. It was set up again in 2001 and changed the name to Aisin Takaoka Foundry Bangpakong (ATFB).

The machining department was separated from SNF in 1985 to Thai Engineering Products (TEP) which had expanded its machining facility to Siam AT Industry (SATI) in 1996. In 1998, sincethe competition in the automotive parts market became more severe, The Nawaloha Engineering Products Sales (NEP) was then established to be the sales & marketing arms for all of the 5 companies in the group : SNF, NIC, ATFB, TEP and SATI.

By end of 2002, NEP had been restructured to be Aisin Takaoka (Thailand) (ATT). It also responsible for Sales,Marketing ,Business Planning & Development and Production Control Function of the group companies.

In the middle of 2011, AT Thailand had been changed the company's name to Aisin Takaoka Asia Co.,Ltd.
(AT-A). It executes continuously all sales and marketing business which AT Thailand had handled for ATTG.
In the near future, AT-A has a plan to guide group companies management efficiently as a corporate
office for Asia area except China.