[2][N 1] On July 21 of the same year, Taki opened the Naoetsu Aquarium in the precincts of Yasaka Shrine in the town of Naoetsu, with a 1-inch (2.54 cm) thick glass aquarium equipped with a circulating filtration system to display local fish species, and a large tank in which giant sea bream and trout were released.

In the second year, the tank was expanded, but Taki decided to close the museum due to lack of cooperation from the town of Naoetsu, and as a result of the survival movement and the attraction of the surrounding community, it was decided to build a new building and move to the area near Gochi Kokubunji in Kasuga Village (later incorporated into Takada City, now Joetsu City) The decision was made.

The building was in the style of a small light blue movie theater, and although it was very crowded with school excursion students and group tourists, it seems to have closed in 1943 due to the Pacific War.

[2][N 1] Due to the aging of the facilities and the problem of wave erosion on the coast, the Aquatic Museum was newly built and relocated to the Seaside Park in 1957.

There was also an outdoor breeding shed where bears, Japanese macaques, ducks, Indian peacocks, and other birds and animals were kept.

[N 2] In 2006, Joetsu City established the "New Aquarium Development Study Committee" to consider reconstruction, but the plan was temporarily suspended in 2007 due to the financial review at that time.

In the same year, the 2004 Chūetsu earthquake damaged the "Marine Jumbo," a large water tank, and repair work was carried out.

With the Hokuriku Shinkansen bullet train scheduled to open in the spring of 2015, it was necessary to consider the effect on attracting visitors, and in November 2011, work began again on the plan.

The 6th Joetsu Aquarium building received the BCS Award from the Japan Federation of Construction Contractors [ja] for its design of the Umigatari tank was evaluated.

The verification will be conducted from the three perspectives of breeding, construction, and water quality, and a total of five experts from each were selected and organized.

The effect of the sunshade was evident, with a maximum temperature of 33.5°C recorded, while the difference between sun and shade near the water surface was observed to be up to 3°C.

[N 7] Subsequently, in an effort to further reduce winter winds, a windbreak net approximately 20 meters wide and 1.7 meters high was installed on the north face of the dolphin pool and a glass windbreak wall was installed on the west face railing.