A Legendary Stop on Our KTEC Japan Trip – Promodet Komine Engineering

Tucked away in a quiet corner of Tokyo sits a name whispered with reverence among Porsche enthusiasts – Promodet Komine Engineering. For those who speak the language of air-cooled flat-sixes, this is sacred ground. On our recent KTEC trip to Japan, we were lucky enough to step through its doors – and into the beating heart of Japan’s Porsche tuning culture.

The air inside the workshop was thick with history. Half-built engines sat like sculptures, precision-machined parts neatly lined the benches, and in every corner there was a car with a story to tell. This is the birthplace of some of the most iconic Porsches ever to roll onto Japanese streets – and beyond. Komine-san’s touch can be found on Nakai-san’s legendary RWB builds Stella Artois and Rotana, machines that have become poster cars for a generation. And then there’s the original Midnight Club 930, a car that carries the weight of street racing legend on its shoulders.

Komine-san greeted us with the warmth of an old friend. What followed was an afternoon of pure automotive storytelling – discussions about engine breathing and cooling, suspension geometry, and the delicate balance between power and reliability in an air-cooled build. Every word revealed the quiet obsession and relentless pursuit of perfection that has made Promodet a global name.

We left feeling like we’d just been given a rare audience with the keeper of a secret craft – someone who has spent a lifetime refining not just machines, but a philosophy.

A huge thank you to Komine-san and the entire Promodet team for opening their doors and sharing their world with us. This was more than a workshop visit – it was a pilgrimage.