The debut or first appearance of something or someone; used to indicate a new release or first-time appearance (product, person, character, etc.).
この新商品は今週新登場し、店頭で販売が始まった。
This new product debuted this week and began selling in stores.
期間限定で新登場のメニューをお試しください。
Please try the newly introduced limited-time menu.
あのドラマに新登場したキャラクターが話題になった。
The character who newly appeared in that drama became a hot topic.