Welcome to the 1980's and era when giant world expositions were in fashion. By finding the cheapest flight I could, I managed to persuade the RN programme director to let me go and report on what was one of the last great expos. Radio Netherlands was, at that time, thinking of building a relay station in Asia. NHK Radio Japan was part of what I called the gang-of-five international broadcasters, although NHK was much larger than Radio Netherlands.
There is an excellent FEN report on Youtube which gives you some idea of the scale of the event. The Tokyo expo was actually in Tsububa, so I recall my first ride on the bullet train. One hundred eleven countries set up exhibits using the theme, "Dwellings and Surroundings - Science and Technology for Man at Home". More than 20.3 million people attended the three-month event. I was one of them. Wish I had had a camera. But I did have a microphone and help from NHK. Remember being amazed at how cramped everything was at Radio Japan.