Aizumi is a town located in Itano District, in northeastern Tokushima Prefecture, Japan.

Anan is a city in Tokushima Prefecture, Japan. The city was founded on May 1, 1958.

Awa Province was an old province of Japan in the area that is today Tokushima Prefecture on Shikoku. Awa was bordered by Tosa, Sanuki, and Iyo Provinces. It was sometimes called Ashū (阿州).

Awa is a city located in Tokushima Prefecture, Japan.
Hanoura was a town located in Naka District, Tokushima Prefecture, Japan.
Higashimiyoshi is a town located in Miyoshi District, Tokushima Prefecture, Japan.
Ikeda was a town located in Miyoshi District, Tokushima Prefecture, Japan.
Ishii is a town located in Myōzai District, Tokushima Prefecture, Japan.

Itano is a district located in Tokushima Prefecture, Japan.
Itano is a town located in Itano District, Tokushima Prefecture, Japan.

Kaifu is a district located in Tokushima Prefecture, Japan.
Kaiyō is a town located in Kaifu District, Tokushima Prefecture, Japan.
Kamiita is a town located in Itano District, Tokushima Prefecture, Japan.

Kamikatsu is a town located in Katsuura District, Tokushima Prefecture, Japan.
Kamiyama is a town in Myōzai District, Tokushima Prefecture, Japan.

Katsuura is a district located in Tokushima Prefecture, Japan.

Katsuura is a town located in Katsuura District, Tokushima Prefecture, Japan.

The Kii Channel , also called the Kii Strait, is a strait separating the Japanese island of Shikoku from the Kii Peninsula on the main island of Honshū. This strait connects the Inland Sea with the Pacific Ocean.

Kitajima is a town located in Itano District, Tokushima Prefecture, Japan.
Komatsushima is a city located in Tokushima Prefecture, Japan. The city was founded on June 1, 1951.
Matsushige is a town located in Itano District, Tokushima Prefecture, Japan.

Mima is a district located in Tokushima Prefecture, Japan.
Minami is a town located in Kaifu District, Tokushima Prefecture, Japan.

Miyoshi is a district located in Tokushima Prefecture, Japan.

Miyoshi is a city located in Tokushima Prefecture, Japan.
Mugi is a town located in Kaifu District, Tokushima Prefecture, Japan.

Myōdō is a district located in Tokushima Prefecture, Japan.

Myōzai is a district located in Tokushima Prefecture, Japan.

Naka is a district located in Tokushima, Japan.
Naka is a town located in Naka District, Tokushima Prefecture, Japan.

Naruto Strait is a strait between Awaji Island and Shikoku in Japan. It connects Harima Nada, the eastern part of the Inland Sea and the Kii Channel. A famous feature of the strait is the Naruto whirlpools. Ōnaruto Bridge, the southern part of the Kobe-Awaji-Naruto Expressway, crosses over it.

The Naruto whirlpools are tidal whirlpools in the Naruto Strait, a channel between Naruto in Tokushima and Awaji Island in Hyōgo, Japan. The strait between Naruto and Awaji island has a width of about 1.3 km. The strait is one of the connections between the Pacific Ocean and the Inland Sea, a body of water separating Honshū and Shikoku, two of the main islands of Japan. The tide moves large amounts of water into the Inland Sea twice a day and also removes large amounts of water twice a day. With a range of up to 1.7 m (5.6 ft), the tide creates a difference in the water level of up to 1.5 m between the Inland Sea and the Pacific. Due to the narrowness of the strait, the water rushes through the Naruto channel at a speed of about 13–15 km/h (8–9 mph) four times a day, twice flowing in and twice flowing out. During a spring tide, the speed of the water may reach 20 km/h (12 mph), creating vortices up to 20 m (66 ft) in diameter.
Naruto is a city located in Tokushima Prefecture, Japan. The city was founded on March 15, 1947.
Sanagōchi is a village located in Myōdō District, Tokushima Prefecture, Japan.

The Sanuki Mountains are a mountain range running along the southern border of Kagawa and the northern border of Tokushima prefectures on the island of Shikoku, Japan.

The Yoshino River is a river on the island of Shikoku, Japan. It is 194 km (121 mi) long and has a watershed of 3,750 km2 (1,450 sq mi). It is the second longest river in Shikoku, and is the only river whose watershed spreads over the four prefectures of the island.
Yoshinogawa is a city located in Tokushima Prefecture, Japan.
Yuki was a town located in Kaifu District, Tokushima Prefecture, Japan.