Probably quite true. A little web chasing reveals that Iseki is the 3rd largest AG equipment mfr in Japan. Also that AGCO sells blue Iseki-branded tractors up to 60 HP in Australia and New Zealand. Both 3 and 4 cyl engines. My first thought is that in most if not all of these tractor manufacturers, the engine is the LEAST of your worries and you are far more likely to have whatever problems you have elsewhere, not with the engine. I've had Kubota, Yanmar and Perkins engines on various tractors, had MANY problems (at least a few on every brand) and NEVER had an engine problem, ever. I think all the mfrs know that the engines in their products have to be "good" otherwise they will soon be out of business. And they do adequate QC accordingly. Same as the auto industry. I cannot say the same for QC on the rest of the tractor.