Life in the Coral Reefs and Swimming with Humpback Whale filmed by Japanese senior photographer Hiroyuki Nakagawasai (中川西宏之), as commissioned by the Delta, won the gold award in the long- and medium-length documentary film category and the gold award in the short-length documentary film category at the WorldFest-Houston, respectively. After Water with Life in 2019 won the gold award in the long- and medium-length documentary film category at the WorldFest-Houston, the 8K films produced by Delta are once again recognized by the international film festival.

Senior Japanese photographer Hiroyuki Nakagawasai was commissioned by the Delta to film Life in the Coral Reefs and Swimming with Humpback Whale in the Pacific Islands. With the ultra-high-resolution 8K image and close-up shots, he leads the audience to experience the coral reef ecosystem of the "tropical rainforest in the sea" with rich biodiversity in the colorful and blue underwater world.