We took the boat on a summer Saturday afternoon, and it wasn’t crowded at all. The ride went smoothly around Yokohama City to Yamashita Park, with no stops on our trip. It lasted about 15 minutes, and the ticket price was 1,000 yen—fair value for the experience.
A few tips: summer might not be the most comfortable time due to the heat, so plan accordingly. It’s a good idea to line up 10–15 minutes early at the gate to get the best seats. If you’re boarding from Yokohama East Exit, the right-hand side middle seats give you the best views. For the most memorable experience, going in the evening during cherry blossom season is highly recommended.