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The most well-known theory about the origin of the place name is found in the early Heian period history book "Shoku Nihon Koki." According to it, around the end of the 5th century or the beginning of the 6th century, Mononobe no Oji, a powerful clan in the Kinai region, was awarded part of Shimousa Province by the Imperial Court in recognition of his achievements in pacifying the Kanto region. This area came to be called "Sosa County," and his descendants are said to have taken the name Mononobe no Sosa.
The area is also attractive for its wide variety of agricultural products, including sweet green onions, high-quality long green onions branded as "Hikari Negi," and fully ripened red bell peppers. Red bell peppers are highly nutritious, sweet, and easy to eat, making them a favorite with children.
Sosa City
Sosa City is "Sousashi"It is pronounced "safusa." There is no consensus on the meaning, but one theory is that it comes from the sound "safusa," meaning "a land where beautiful hemp can be harvested," and another is that it was named because it was a particularly large county in Shimousa Province. The current spelling is thought to be an auspicious kanji character.
Learn about difficult-to-read place names in Japan
Difficult to read place names are engraved with the local language, culture, and history of coexistence with nature. Knowing the origin of the name can make the scenery of your travel destination look a little different. That is the mysterious charm of difficult to read place names. Unraveling place names is like tracing the memories of the place. Learning the hidden meaning behind the characters leads to learning the depth of the story the place name tells.
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![[Difficult to read place names] How do you read them? Difficult place names in Chiba Prefecture are not read as "Nantokashi?"](https://www.premium-j.jp/wp-content/uploads/2026/02/0647e736dab09925d715a373031799d5.png)






























