上手（じょうず）— good at; skillful

ココさんは料理りょうりが上手じょうずです。

Coco is good at cooking.

上手じょうず

good at; skillful

じょうず

accent [3]

In detail

Words

ココさんKoko-sanCoco

はwa(topic marker)

料理ryouricooking

がga(marks the skill being described)

上手jouzugood at; skillful

ですdesu(polite sentence ending)

上ジョウ・ショウ・うえ・あ（がる）・のぼ（る）above; up

手シュ・てhand

上手 is a な-adjective describing skill. It is often used to praise others; using it about yourself can sound boastful, depending on context.

Coco-sensei