不可(ふか)

ふか
noun, na-adjective
impossible, wrong, not allowed
academiceducationabstract
1. impossible, not possible
Cannot be done or achieved.
一度(いちど)提出(ていしゅつ)した書類(しょるい)は変更(へんこう)不可(ふか)です。
Documents cannot be changed once they have been submitted.
実現(じつげん)不可(ふか)とされていた計画(けいかく)。
A plan that was considered impossible.
現状(げんじょう)では不可(ふか)だ。
It's not possible in the current situation.
2. wrong, improper
Not acceptable or appropriate.
撮影(さつえい)不可(ふか)。
No photography allowed.
Common sign
持(も)ち込(こ)み不可(ふか)。
No outside items allowed.
飲食(いんしょく)不可(ふか)のエリア。
An area where eating and drinking are not allowed.
3. failing grade
An academic grade indicating failure.
成績(せいせき)が不可(ふか)だった。
The grade was a fail.
試験(しけん)で不可(ふか)を取(と)った。
I got a failing grade on the exam.
不可(ふか)が二(ふた)つあると留年(りゅうねん)する。
If you get two failing grades, you repeat the year.

不可(ふか) is a Sino-Japanese word meaning "not permissible" or "impossible." It functions as both a noun and a na-adjective, and appears frequently in compound words and on signs.

COMPOUNDS (as a prefix):
不可(ふか) attaches to other Sino-Japanese words to form compounds meaning "cannot be ~":

COMMON PATTERNS (on signs):
Very common on signs in the pattern 〜不可(ふか) (~ not allowed):

CULTURAL NOTE (university grades):
In Japanese universities, 不可(ふか) is the failing grade (equivalent to F). The full scale is:

  • 秀(しゅう): A+, 優(ゆう): A, 良(りょう): B, 可(か): C, 不可(ふか): F

Related Words

Compare: 不能(ふのう) (impossibility)
general
Added 2026.1.9 21:30 · Revised 2026.10.14 22:34
01500/01922_fuka