野衾

野 (no-, “wild”) +‎ 衾 (fusuma, “quilt”). The fusuma changes to busuma as an instance of rendaku (連濁).

• 野臥間, 野伏間

野衾 (hiragana のぶすま, katakana ノブスマ, rōmaji nobusuma)

1. (Japanese folklore) Monster, 妖怪 (yōkai), resembling a Japanese giant flying squirrel or large bat said to eat tree fruits, blood of living creatures and fire
2. Another name for 鼯鼠 (musasabi): Japanese giant flying squirrel
3. Another name for モモンガ (momonga): flying squirrel

The kanji are Jukujikun (熟字訓).

野衾 (hiragana ももんが, katakana モモンガ, rōmaji momonga)

1. Alternative spelling of モモンガ (“flying squirrel”)