Before the 20th century, the idea that a painting should be framed and hung permanently on wall was a completely foreign concept in Asian countries like China and Japan. Art hanging on the wall was transitory and meant to be rolled up and stored, changed to match the occasion or season or mark an honored guest. These scroll paintings, usually ink on silk or paper, had weighted rods made of wood, ivory, or porcelain at the bottom and were stored in boxes marked with the name of the artists and the date.
Scrolls are an intimate form of painting meant to be touched and viewed up close. Part of the joy of owning an Asian scroll is the process of taking out a painting that's been in storage and re-experiencing it, bit by bit, as it unrolls. Since ancient times, Buddhist monks all over Asia, including India, Tibet, and Nepal, employed painted scrolls called "thangka" as a portable means for teaching their philosophy.
Early Chinese paintings were stories, told in pictures or in calligraphy, with wooden rollers attached to either side, read from right to left, a narrative art that was adapted by the Japanese during the influx of Chinese culture in the sixth century. These handscrolls are now rare, as few were made in the past century.
In China, horizontal scrolls were also employed as a canvas for landscape painting, and around the third century the Chinese were making screens that sometimes incorporated vertical scroll paintings. When these concepts reached Japan, the artisans of the Heian era (794-1185) were eager to make them their own, with non-religious Japanese themes like cherries, maples, and birds.
Common motifs in hanging scrolls include poems and Zen sayings in Japanese and Chinese calligraphy, as well as landscapes, seasons, flower-and-bird combinations ("kacho" in Japanese), religious themes, Zen icons, military scenes, Chinese boys, and portraits. During World War II, American soldiers in Japan were partial to "kakemono" showing women in kimonos, and so these hanging scrolls were mass-produced cheaply.
Japanese "kakemono" scrolls from masters from the Kano school, as well as big names like Uemura Shoen and Yokoyama Taikan go for a high price tag these days, but antique and vintage scrolls by unknowns sell for a few hundred dollars in Japan. Be sure to look for expected wear-and-tear, as most truly old scrolls will look a little beat up.