The then NANKAI had been used to making equipment for submarine until the end of the war.
Back to the peace time, the company changed its product line to various Heat Exchangers and chemical reactors for many of the major Petro-chemical plant in Japan. The company gained good fame in their high quality control capability for many decades. clients such as Mitsubishi Heavy Industries, Mitsui Chemical, Toray Engineering, etc. The technology and fabrication know-how built under a severe specification of customers of these times, formed the origin and strength of SLOT-NANKAI in Thailand.