Game Item Number: Ed5.3073 a-o from the MOA: University of British Columbia
Part a is a loosely woven yellow cloth, with each pair of corners tied at the sides; used to hold pairs of clam shells for kaiawase (貝合わせ), a shell matching game; the cloth has black calligraphy on the outside. There are seven pairs of cream coloured clam shells (parts b-o), with matching scenes painted on gold paper glued to the insides. The gold paper has dots and geometric patterns; each shell has a horizontal greenish band across it representing a river. The first pair (pts b-c) have red and blue flowers on the upper side. The next pair (pts d-e) have a branch with flowers and two white and black birds with red breasts on the upper half. The third (pts f-g) have brown grass and red and blue flowers in the upper half. The fourth pair (pts h-i) have red and blue flower sprays in the upper half, and the gold is rubbed off in a few places. The fifth pair (pts j-k) have a fence with blue and red flowers above. The sixth (pts l-m) have a brown log-like feature. The last pair (pts n-o) have three white flowers and one red flower in the upper section. Parts b-o have polished, natural shell exteriors.
Kaiawase (貝合わせ), or the game of matching shells, was originally played by court women during the Heian period (794–1185). The game was later played by different classes, and became popular during the Edo period (1603–1868). A complete set of kaiawase contains 360 pairs of shells around the same size. Each pair was decorated with images from literature or nature. The shells are divided into 2 groups; one group, ji-gai (地貝) is scattered on the floor; the other group, dashi-gai (出し貝) are produced by the participants, who compete in finding the correct counterpart on the floor. The winner is decided by obtaining the greatest number of matching pairs.