I was on a solo trip in Japan and my first stop was Tokyo. I'd wanted a quick and easy way to see a lot of the city, and e-biking was it. I arrived at the office to find out that the other group(s) of people cancelled, so I'd have a solo tour. I was introduced to my tour guide, Take-san, and he showed me a map of the city and we talked through what I might like to do/if I wanted a different path given that I was the only one going on the tour. We decided to change it up a bit based on what I'd done the day before.
Take-san took me around the city and was very patient and knowledgable throughout. He showed me different areas, and we had time in a few of the temples and touristy areas. He'd stop whenever he wanted to point out something of interest (he asked my interests throughout), whether it was a shrine, restaurant, garden, etc., which I really appreciated. I highly recommend this tour as a great way to see different areas of the city and learn a bit in the process.
I also want to note that if you're an American reading this, there's no reason to be scared biking through Tokyo. I do not bike on the streets where I live, but both the pedestrians and drivers in Tokyo are extremely respectful and courteous. I did not feel unsafe at all, even when going through very busy areas.