Simplify the following text for a Grade 10 native English-speaking person.
Original: Some kamaboko include artistic patterns , such as the pink spiral on each slice of narutomaki , named after the well-known tidal whirlpool near the Japanese city of Naruto .
Simplified: Some kamaboko known as narutomaki is made with a swirl pattern in the center of each slice , named after the famous tidal whirlpool in the Japanese city Naruto .