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The character 柴 originally depicted bundles of firewood or brushwood. In ancient oracle bone script, it showed branches or twigs tied together. Over time, it evolved through bronze script to clerical script, eventually becoming the modern 柴. The character combines the radical for 'tree' (木) with the element meaning 'this' (此), suggesting 'this wood' used for fuel. Its meaning expanded to include 'brushwood,' 'firewood,' and by extension, 'rough' or 'coarse.' The character also appears in compound words like 柴扉 (brushwood gate) and surnames. Arrived in Japan: The character 柴 arrived in Japan during the Yayoi period (300 BCE - 300 CE) or early Kofun period (300-538 CE) through cultural exchange with China and Korea, likely as part of the introduction of Chinese writing systems. It became established in Japanese as the kanji 柴, used in words like 柴犬 (Shiba Inu, meaning 'brushwood dog' for its ability to hunt in brushwood) and surnames like Shiba (柴).