Characters are symbolic elements of culture and important vessels of history. Japan’s commonly used kanji (Chinese characters) are deeply embedded in daily life through their rich meanings and forms. In this article, we spotlight the kanji “拡”(Kaku / Hiroge-ru), exploring its origins, meanings, and usage. For Japanese language learners, understanding the background of this character offers valuable insight into the depth of the language.
Origin of 拡 (Kaku) – Etymology
The character “拡”(Kaku) is composed of the radical “扌”(Tehen, representing “hand”) and the phonetic component “広”(hiro). “広” itself is made up of “广”(Madare, a roof-like symbol representing a building) and “口”(Kuchi, mouth), originally depicting an open space or a house expanding outward. Thus, “拡” conveys the idea of “expanding by hand,” which evolved into meanings like “to widen” or “to enlarge.”
Meaning and Usage of 拡 (Kaku)
“拡”(Kaku) means “to expand,” “to spread,” or “to enlarge.” It appears in various contexts from physical expansion to abstract concepts. Common expressions include “拡散”(Kakusan, diffusion), “拡張”(Kakuchou, extension), and “拡大”(Kakudai, enlargement). In business contexts, phrases such as “拡大する市場” (Kakudai suru shijou, expanding markets) or “商品ラインの拡張” (Shouhinrain no kakuchou, product line expansion) are widely used.
Readings, Stroke Count, and Radical of 拡 (Kaku)
Here are the key features of the kanji “拡”(Kaku):
- Readings: On’yomi : Kaku; Kun’yomi : hiroga-ru, hiroge-ru), etc.
- Stroke count: 16 strokes
- Radical: “扌”(Tehen, hand radical)
Common Idioms, Compound Words, and Their Meanings Using 拡 (Kaku)
The kanji “拡”(Kaku) appears in many frequently used expressions. Here are a few examples:
- 拡散 (Kakusan): The spreading or diffusion of something across a wide area.
- 拡大 (Kakudai): Increasing the size or scope of something.
- 拡張 (Kakuchou): Extending or enhancing existing things or functionalities.
- 拡充 (Kakujuu): Enhancing or enriching the content or function of something.
These compound words are commonly used in both business and daily conversation.
Conclusion on 拡 (Kaku)
The kanji “拡”(Kaku) visually and conceptually represents the idea of “expansion.” It is widely used in scenarios that involve growth or development—whether referring to business, technology, physical space, or abstract ideas. Idioms and expressions that include “拡”(Kaku) serve as keys to understanding the cultural and philosophical ideas embedded in language. Embrace the limitless potential carried within this single character, and let it aid your journey toward deeper linguistic and cultural knowledge.


