"The Virgin of the Rosary with Four Saints" (national treasure). Source: anonymous. Early 17th century. Oil painting on brass plate. 30.2 x 24.2 cm. Sendai City Museum (Sendai, Japan). Materials related to the Keicho Mission to Europe. 
This is a painting that is said to have been brought back by Hasekura Tsunenaga. The Virgin Mary, standing on a crescent moon, holds the infant Christ, both holding rosaries. The two are also surrounded by a rosary with rose flowers, with God the Father and angels in the heavens and four saints on the earth. In the center of the screen, a large vertical scratch remains.
Unknown author<span style="display: none;">Unknown author</span>
"The Origins, Spread and Interfaith Connections around the Prayer Beads: A Case Study of the Evangelization of Japan" by Rie Arimura, January 12, 2021, National Autonomous University of Mexico (UNAM) - redalyc.org -  <a rel="nofollow" class="external free" href="http://www.scielo.org.co/pdf/hiso/n36/2357-4720-hiso-36-21.pdf">http://www.scielo.org.co/pdf/hiso/n36/2357-4720-hiso-36-21.pdf</a> , <a rel="nofollow" class="external free" href="https://web.archive.org/web/20230220050051/https://www.redalyc.org/journal/369/36972034008/html/">https://web.archive.org/web/20230220050051/https://www.redalyc.org/journal/369/36972034008/html/</a>