This footage was taken to show you what's inside the Naruto Whirlpool sightseeing boat. We bought the tickets for this sightseeing trip at the Naruto Whirlpool Station near the Museum of Art in Naruto City, Tokushima. The tickets costs about ¥2,000.
The whole trip was about 30 minutes. That's about 5 minutes each way from the port to the whirlpool sight and for around 20 minutes, the boat stayed right at the center of fun where whirlpools are. They say the best time to watch the whirlpools are during the peak of the high tide or the peak of low tide.