The Japan women's national under-18 and under-19 basketball team is the national basketball team of Japan and is governed by the Japan Basketball Association.

It represents the country in international under-19 and under-18 (under age 19 and under age 18) women's basketball competitions.

At the 2019 FIBA Under-19 Women's Basketball World Cup, Japan finished 8th out of 16 overall. The team displayed some strong showings including its game against eventual bronze medalist Spain, where Japan won two of the four quarters.