[7] In December 2016, 10 Hyundai ix35 FCEVs, the first hydrogen fuel cell taxis in the country, entered test operation.

[12] In 1592, the future port-town of Ulsan was the site of a major battle when warrior monks joined citizen soldiers in resisting Japanese invasion.

[13] On January 29, 1598, a combined military operation between Korea and China tried to besiege the castle, but failed as reinforcements from Japan came to delay the fighting.

[19] Geographically, Ulsan is located at the southeastern tip of the Korean Peninsula and the southern end of the Taebaek Mountains.

As the centre of the Ulsan Industrial District, the city is the corporate base of the multinational Hyundai conglomerate.

[30] Amid a global downturn in shipbuilding, Hyundai Heavy Industries sold $1 billion of assets and laid off large numbers of employees in 2016.

[31] The company borrowed money from the state-run Korea Development Bank in order to purchase Daewoo Shipbuilding & Marine Engineering, forming Korea Shipbuilding & Offshore Engineering, with plans to move corporate headquarters to Seoul.

[32] Some view this downturn as an indicator of South Korea's over-reliance on chaebols, and fear that a period of deindustrialization for Ulsan mirroring the United States' Rust Belt could be on the horizon.

[33] The city has the world's third largest [citation needed] oil refinery with 840,000 BPD, owned by SK Energy.

South Korea's no.3 S-oil refinery complex with 669,000BPD and 1.7million PX plant of world single largest facility, 39,000BPD lubricant base oil, owned by Saudi Aramco, is also in Ulsan.

[6] Ulsan is the home of the world's largest automobile assembly plant, with an annual capacity of 1,700,000 units, operated by Hyundai Motors.

The plant started with 50,000 capacity in 1968 and has expanded 30 times to become the top complex in the world with its own export piers with logistics competitiveness.

[4] Its integrated design of related functions was inspired by the Ford River Rouge Complex in Dearborn, Michigan.

In November 2011, SB LiMotive opened an advanced lithium-ion battery production plant in Ulsan.

[34][35][36] In September 2012, Samsung SDI bought out Robert Bosch GmbH's portion of SB LiMotive for $95 million to gain 100% ownership of the Ulsan production facility.

As of October 2024, 188km of underground pipelines have been laid to connect hydrogen produced as a byproduct from petrochemical complexes to the city center.

[42] In December 2016, 10 Hyundai ix35 FCEVs, the first hydrogen fuel cell taxis in the country, entered test operation.

In Yeongnam Alps, there are seven tall mountains (Gajisan, Sinbulsan, Ganwolsan, Cheonhwangsan, Yeongchuksan, Goheonsan, Jaeyaksan) over 1,000m above sea level.

The museum provides a variety of information related to whales and marine ecosystems; it is a space for education, research and experience.

Ulsan is one of the filming locations of the Munhwa Broadcasting Corporation 2012 South Korean television melodrama series May Queen, starring Han Ji-hye, Kim Jae-won, and Jae Hee.