However, the largest bicycle parts factory in the world is in Japan (Osaka). It's shimano. More than 98% of bicycle transmissions in the world are produced by Shimano. And various parts of bicycles are also sold to various brands all over the world. If you have a chance, you can look at the words "Shimano" on many bicycles. (Rear axle, brakes, etc.)
I have never heard of Hirohito. I'm sorry, but Hirohito once received a tricycle from his mother, Empress Zhenming, which Hirohito used in primary school, and later another one was used by the Emperor in a senior school. It was also from Hirohito that bicycles gradually became popular. Up to now, these two tricycles are still listed in the Hirohito Memorial Hall. You can go and have a look if you have the opportunity. By the way, those two tricycles are made of pure Shimano (Japan).