is an arm of the western end of the

Seto Inland Sea The , sometimes shortened to the Inland Sea, is the body of water separating Honshu, Shikoku, and Kyushu, three of the four main islands of Japan. It serves as a waterway connecting the Pacific Ocean to the Sea of Japan. It connects to Osaka Ba ...

Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...

. Beppu Bay is located on the northeast coast of

Kyushu is the third-largest island of Japan's Japanese archipelago, four main islands and the most southerly of the four largest islands (i.e. excluding Okinawa Island, Okinawa and the other Ryukyu Islands, Ryukyu (''Nansei'') Ryukyu Islands, Islands ...

Ōita Prefecture is a prefecture of Japan located on the island of Kyūshū. Ōita Prefecture has a population of 1,081,646 (1 February 2025) and has a geographic area of 6,340 km2 (2,448 sq mi). Ōita Prefecture borders Fukuoka Prefecture to the northwest, K ...

. The city of Ōita lies on its southern coast and the city of

Beppu 270px, Beppu City Hall is a city in Ōita Prefecture on the island of Kyushu, Japan. As of November 30, 2023, the city had a population of 113,045 in 62,702 households, and a population density of 900 persons per km2. The total area of the ci ...

at its western end.''Websters New Geographical Dictionary'', Springfield, Massachusetts: Merriam-Webster Inc., 1984, pp. 137, 568.

Notes

Bays of Kyushu Landforms of Ōita Prefecture {{Oita-geo-stub