Katōmado
, also written , is a style of pointed arch or bell-shaped window found in Japanese architecture. It first arrived in Japan from China together with Zen Buddhism, as an element of Zen style architecture, but from the end of the 16th century it started to be used in temples of other Buddhist sects, Shinto shrines, castles, and samurai residences as well. The window initially was not flared, but its design and shape changed over time: the two vertical frames were widened and curves were added at the bottom. The "kanji" characters used for its name have also changed through  the centuries, from the original "fire window" to "flower head window".<ref name="urlKyoto City Web / Preview Kyoto / Kato-mado Window"></ref> The oldest extant example of "katōmado" can be found in Engaku-ji's "Shariden" (Relic Hall) in Kamakura, which is thought to closely follow the original style as it was introduced to Japan, with the vertical frames touching the bottom in straight lines. Another well-known example can be found in the room called in the Main Hall at Ishiyama-dera, Shiga prefecture. For this reason, "katōmado" are also known as .