JAMSTEC

JAMSTEC, the Japan Agency for Marine-Earth Science and Tecnology is the Japanese national research institute for marine-earch science and technology.

Jamsteeec
In April and May 2018, JAMSTEC and the Japanese Splatoon Twitter account announced a collaboration and cross-promotion called Jamsteeec, which included:
 * The Unknown Creature vs  Advanced Technology Splatfest
 * The Inkling world's version of JAMSTEC, with a few details:
 * The, designed after the real-world JAMSTEC hard-hats.
 * The research and deep-earth drilling ship, CHIKYU, was added to the background of the Manta Maria stage.
 * The deep-sea submarine Shinkai 6500 was shown to exist in the background details of the Octo Expansion.
 * There was also a post highlighting the fact that the was designed after the Shinkai 6500.
 * Videos showing real-life deep sea squids and Octopuses, in comparison with Inklings and Octolings.
 * Several posts on the real-life creatures that inspired some of the characters in the Octo Expansion, including C.Q. Cumber (sea pig) and Iso Padre (giant isopod).
 * An free "open day" held on 2018-05-12, at the JAMSTEC headquarters in Yokosuka was promoted on the SplatoonJP Twitter
 * Splatoon 2 collaboration activities at the event itself, such as presentation of the "research reports", an exhibition stamp rally, photo ops, and coloring book illustrations.