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The thumbnail is an example of a way to describe this type of newfangled keyboard.
Check out the LOTTE dance videos for FUNYAFUNYA in the lyrics!
羽=hane
二=futa(tsu)
重=omo(i)
餅=mochi
Together you pronounce them...
羽二重餅=habutaemochi
funyafunay
フニャフニャ
ふにゃふにゃ
limp
soggy
saggy
flabby
floppy
soft
flimsy
etc.
for japan Japanese morons フニャフニャ Funyafunya! (Japanese 133)