manju

In 1349, a Chinese man named Lin Jingyin, known in Japan as Rinken, arrived in Nara accompanying the Zen monk Musō Soseki and brought with him the recipe for mantou, a Chinese steamed bun. Chinese mantou at the time often contained meat, but Rinken's Buddhist practice required a vegetarian filling, so he substituted sweetened azuki bean paste. He opened a shop in Nara and sold the modified bun as manju. The word is a direct phonetic borrowing of the Chinese mantou, filtered through Japan's sound system.

Chinese mantou (馒头) had its own long history before Rinken carried it east. The Song dynasty historian Gao Cheng, writing in 1080, claimed the dish was invented by the strategist Zhuge Liang (181-234 CE), who shaped dough into human heads to substitute for human sacrifice during a river-crossing ceremony. The story is probably apocryphal, but mantou's presence in Chinese culinary writing dates at least to the Northern Wei period (386-534 CE). When it arrived in Japan, it was already a thousand-year-old food.

Rinken's manju established a Japanese confectionery tradition. By the Muromachi period (1336-1573), multiple wagashi schools were producing manju variants in Kyoto, each competing for the patronage of samurai lords and temple officials. The Edo period (1603-1868) brought commercial expansion: manju shops multiplied across castle towns, and regional styles diverged sharply. Nagasaki's bakers, influenced by Portuguese contact, eventually folded egg-yolk glazes into their versions.

The Japanese manju diverged from its Chinese source in texture, sweetness, and occasion. Chinese mantou became a savory staple bread; Japanese manju became a sweet confection for ceremonies, festivals, and tea. Today the word covers a broad category: steamed, baked, or fried buns filled with azuki, white bean paste, or sesame. The Chinese origin is visible only in the word itself.