Resonac Dome Oita (レゾナックドーム大分) is a retractable roof, multi-purpose stadium in the city of Ōita in Ōita Prefecture on Kyushu Island in Japan.

The stadium was built for Ōita Prefecture, which still owns it. Design was led by the famous architect Kisho Kurokawa and his firm Kisho Kurokawa Architect & Associates, and construction was carried out by a construction group led by the Takenaka Corporation. The stadium opened as Oita Stadium in May 2001.

In 2006 it was renamed Kyushu Oil Dome (九州石油ドーム, Kyūshū Sekiyu Dōmu), as a result of a sponsorship deal with Kyushu Oil [ja]. In early 2010, the stadium was renamed Oita Bank Dome (大分銀行ドーム, Ōita Ginkō Dōmu) when sponsorship shifted to Oita Bank [ja]. In early 2019, the stadium was renamed Showa Denko Dome Oita (昭和電工ドーム大分) after Showa Denko acquired naming rights. On 1 January 2023 Showa Denko merged with another another company, forming Resonac Holdings Corporation, and the stadium was given its current name.

The stadium is primarily used for football, and is the home field of J.League club Oita Trinita.

The stadium originally had a capacity of 43,000. After the 2002 FIFA World Cup, 3,000 movable seats on the track were removed, giving the stadium its current capacity of 40,000.

Date	Team #1	Result	Team #2	Round	Attendance
June 10, 2002	Tunisia	1–1	Belgium	Group H	39,700
June 13, 2002	Mexico	1–1	Italy	Group G	39,291
June 16, 2002	Sweden	1–2 (asdet)	Senegal	Round of 16	39,747

Date	Time (JST)	Team #1	Result	Team #2	Round	Attendance
October 2, 2019	19:15	New Zealand	63–0	Canada	Pool B	34,411
October 5, 2019	14:15	Australia	45–10	Uruguay	Pool D	33,781
October 9, 2019	18:45	Wales	29-17	Fiji		33,379
October 19, 2019	16:15	England	40-16	Australia	Quarterfinals	36,954
October 20, 2019	16:15	Wales	20-19	France		34,426

Resonac Dome Oita has a retractable dome roof, which uses a wire traction system. Other features of the stadium:

• Building area: 51,830 m (557,900 sq ft)
• Total floor area: 92,882 m (999,770 sq ft)
• Covered area: 29,000 m (310,000 sq ft)
• Stand inclination: max. 33 degree angle

• Sapporo Dome in Sapporo, Hokkaido Prefecture
• Noevir Stadium Kobe in Kobe, Hyōgo Prefecture
• Big, Bigger, Biggest - documentary TV series, features the stadium in episode 9 of series 2
• List of stadiums in Japan
• Lists of stadiums

• Dome - Oita Sports Park (in Japanese)
• Big Bigger Biggest program featured the Ōita Bank Dome (50:10, YouTube video)