kyu

As nouns the difference between grade and kyu

is that grade is rank while kyu is a grade or rank in japanese martial arts.

As an adjective grade

is nco or officer (attributive).

As nouns the difference between japanese and kyu

is that japanese is a person living in or coming from Japan, or of Japanese ancestry while kyu is a grade or rank in Japanese martial arts.

As an adjective Japanese

is of, relating to, or derived from Japan, its language, or culture.

As a proper noun Japanese

is the main language spoken in Japan.

As nouns the difference between rank and kyu

is that rank is a row of people or things organized in a grid pattern, often soldiers [the corresponding term for the perpendicular columns in such a pattern is "file"] while kyu is a grade or rank in Japanese martial arts.

As an adjective rank

is strong of its kind or in character; unmitigated; virulent; thorough; utter.

As an adverb rank

is quickly, eagerly, impetuously.

As a verb rank

is to place abreast, or in a line.