Siam Aisin Co,. Ltd.

Thailand is a country with the readiness in terms of basic public utilities that are suitable for manufacturing. Therefore, Aisin Seiki Company from Japan established “Siam Aisin” Company in 1996 at 304 Industrial Park, Prachin Buri Province.

In the early period of the capital structure for company establishment, Aisin Seiki held 50% shares, Siam Cement held 47 shares, and Toyota Tsusho (Thailand) held 3% shares. Therefore, this was the source of the name “Siam Aisin”.

Moreover, there was the concept of creating the company symbol that connected Letter S and Letter A, the abbreviation of Siam Aisin, to convey the wave that moves forward with the crossed circle in the middle to convey precision and accuracy.

In 2002, there was a change in shareholdings. In other words, Aisin Seiki held 97% shares and Toyota Tsusho (Thailand) held 3% shares. In 2003, the investment had increased from 680 million baht to 880 million baht.

Currently, there are 5 factories that produce automotive parts in 5 product groups, which are body parts, brake parts, electronic parts, drivetrain parts and engine parts that are certified by IATF 16949:2016, ISO 9001:2015 and ISO 14001:2015

The Chief Executive of the Company are:
1.) Mr. Tatsuyuki Saito, Managing Director (MD)
2.) Mr. Pichai Rodklam, Deputy Managing Director (DMD)
3.) Ms. Phattiya Rattanajantranont, Deputy Managing Director (DMD)


1996Established Siam Aisin Co., Ltd.
1998Started operation for brake, engine, and drivetrain parts and delivered the products to the first customer (first shipment)
1999Grand opened ceremony of Siam Aisin Co., Ltd. and started operation for body parts
2003Increased investment from 680 million baht to 880 million baht
2004Started operation for IMV model and electronic parts
2007Initiated the project of After Market in Thailand
2008Celebrated the 10th year anniversary of Siam Aisin “Moving Together”
2010Expanded the production base to ATAC
2011Started operation for Gravity Casting
2012Had the highest production capacity with employment of up to 2,229 persons
2015Delivered New IMV model parts to the customers
2017Planned the new factory plan (Big Re-layout)
2018Celebrated the 20th year anniversary of Siam Aisin “Smile it forward”
2019Expanded the concept of “3 Pillars” throughout the company (factory and office) and changed the working hours
2020Start operation for Plug-In Hybrid Electric Vehicle (PHEV) parts

Siam Aisin at present

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