Doing some deep diving into the account's followers...
Matthew Pellett is the product manager of PQube, a UK-based games publisher, who has published such games as Fate: EXTELLA and the upcoming Akiba's Beat. They also own and operate the online games retailer Funstock.
Kamipallet, who appears to be the game's character designer, has been reposting a lot of UE4 and Unity stuff on their timeline. A lot of Comiket indie game projects, too; an indie game of theirs appeared at Comiket 91 and they plan on attending BitSummit.
Andy Tsai appears to be a localization manager who works at iNiS.
Keiichi Yano, well, is one of the big heads behind iNiS.
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If I were to guess, this could be a mid-budget digital title on PS4/PC with a limited console physical release.
EDIT: From a quick look at iNiS' website, they have also been doing UE4 engine tests.