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寝そべりぬいぐるみ ハイパージャンボ寝そべりぬいぐるみ メガジャンボ寝そべりぬいぐるみ
Literally means 'to lie down' or 'to sprawl', these are a line of plushies that is made for different franchises. It initially started from Love Live, and has since expanded to other franchises too.
They are primarily manufactured by SEGA, and distributed through resellers or as game prizes, and comes in multiple sizes, from Miniature sizes that can fit over more than your palm, all the way to Mega Jumbo size which are over a foot long and a headsize high.
There have also been a few examples of Tera Jumbo Nesoberi for the cast of Love Live Sunshine, which can cover half of a whole bedlength.
Related Franchises involved with Nesoberis include:
Love Live!
Love Live! School Idol Project
Love Live! Sunshine!!
Perfect Dream Project
Bang Dream!
Fate (Series)
Kono subarashii sekai ni shukufuku wo!
Kaguya-Sama wa kokurasetai ~tensai-tachi no renai zunousen~
tate no yuusha no nariagari
Re:zero kara hajimeru isekai seikatsu
Zombie Land Saga
Kizuna Ai
A game based upon the Nesoberis was released for Japanese Exclusive mobile devices in 2018: Puchiguru Love Live! . The game hadn't lasted long and was shut down at the end of May in 2019.