Seagaia Ocean Dome

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Seagaia Ocean Dome
SeaGaia - Miyazaki Ocean Dome - outside.jpg
Miyazaki Ocean Dome. Surrounded by golf courses.
LocationMiyazaki, Miyazaki, Japan
Coordinates31°57′18″N 131°28′11″E / 31.955112°N 131.469655°E / 31.955112; 131.469655Coordinates: 31°57′18″N 131°28′11″E / 31.955112°N 131.469655°E / 31.955112; 131.469655
OpenedJuly 30, 1993
ClosedOctober 1, 2007
Miyazaki Ocean Dome, main pool.
Ocean Dome - Sheraton Seagaia Resort 2.jpg

The Seagaia Ocean Dome (シーガイアオーシャンドーム, Shīgaia Ōshan Dōmu), was one of the world's largest indoor waterparks, located in Miyazaki, Miyazaki, Japan. The Polynesia-themed Ocean Dome, which was a part of the Sheraton Seagaia Resort, measured 300 metres in length and 100 metres in width, and was listed on the Guinness World Records. It opened in 1993, and visitor numbers peaked in 1995 at 1.25 million a year. Depending on the season, entrance cost was ¥2600 ($21.17) for an adult and ¥1600 ($13.03) for a child. The Ocean Dome was officially closed on October 1, 2007 as part of a renovation and partial re-branding of the resort.[1] It was reopened in 2016[2] but closed and demolished in 2017.[3]

The Ocean Dome sported a simulated flame-spitting volcano, artificial sand and the world's largest retractable roof, which provided a permanently blue sky even on a rainy day. The air temperature was always held at around 30 °C (86 °F) and the water at around 28 °C (82 °F).[4] The roof of the structure was retractable in four sections.[5]


  1. ^ "Press release announcing closure of the Ocean Dome". Phoenix Seagaia Resort. 7 August 2007. Archived from the original on 13 December 2007. Retrieved 4 December 2007.
  2. ^ "The first major renovation of Phoenix Seagaia Resort since its opening". Phoenix Seagaia Resort. 1 October 2016. Retrieved 1 October 2016.
  3. ^ "One of the largest indoor beaches was demolished this year". Steemit. Retrieved 12 October 2018.
  4. ^ "The world's largest indoor water park: Seagaia Ocean Dome, Miyazaki". Japan News Review. 5 June 2007. Archived from the original on 7 October 2007. Retrieved 12 July 2007.
  5. ^ M. Yamamoto, M. Fukihara and M. Komeiji. "Ocean Dome (Japan)". Structural Design of Retractable Roof Structures. Kazuo Ishii, editor. Boston: WIT Press, 2000.

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