Red skin coloration in pears is caused by anthocyanin accumulation, which contributes to antioxidant activity and enhances consumer preference because of its attractive appearance. However, anthocyanin levels are strongly affected by light, making it difficult to maintain stable coloration under bagging practices commonly used in Korea. In this study, we developed the first red-skinned pear cultivar in Korea, ‘Jungmojeoksaek1ho’ (Pyrus pyrifolia×(P. pyrifolia×P. communis)), and examined changes in anthocyanin content according to the timing of bagging. ‘Jungmojeoksaek1ho’ originated from a cross between ‘Manpungbae’ (P. pyrifolia) and ‘Oharabeni’ (P. pyrifolia×P. communis) in 2003 and was registered as a new cultivar in 2025 (Registration No. 10597). The trees were vigorous, with a spreading growth habit. The mean fruit weight was 291.5 g, lower than that of the control cultivar ‘Wonhwang’ (P. pyrifolia), with soluble solids content of 12.8° Brix and titratable acidity of 0.31%. Anthocyanin content analysis of the peel revealed that ‘Jungmojeoksaek1ho’ maintained high levels until 80 days after full bloom (DAFB), followed by a sharp decline. Bagging at 60 or 80 DAFB reduced anthocyanin accumulation, whereas bagging after 100 DAFB maintained relatively high levels in the later stages. These results suggested that bagging after 100 DAFB was optimal for achieving stable red coloration (Registration No. 10597).