Complex sentence: Since the foundation of the T-Engine forum, Sakamura has been working on opening Japanese technology to the world, unlike his previous brainchild, TRON, the universal RTOS in Japanese Consumer Electronics that had almost no adoption in other countries.
Split into simpler sentences: Since the foundation of the T-Engine forum, Sakamura has been working on opening Japanese technology to the world. His previous brainchild, TRON, the universal RTOS used in Japanese Consumer Electronics has had limited adoption in other countries.