拡充（かくじゅう、kakujuu）
- expansion

The Japanese word 拡充 (かくじゅう) means "expansion," "enlargement," "enhancement," or "augmentation." It refers to the act of increasing the scope, size, or quality of something. This can apply to a wide range of things, such as resources, facilities, knowledge, or capabilities. The core idea is to make something bigger, better, or more comprehensive.

⚫︎ 図書館の蔵書を拡充する。 Translation: To expand the library's collection. ⚫︎ 研究体制を拡充する必要がある。 Translation: It is necessary to expand the research system. ⚫︎ サービスのラインナップを拡充しました。 Translation: We have expanded the service lineup.

拡充 is a formal word, suitable for business, academic, or more serious contexts. ⚫︎ It is often used when discussing improvements, plans, or strategies that involve expanding something. ⚫︎ You can use it when talking about adding to, or making something more robust or comprehensive. ⚫︎ This word is less likely to be used in casual conversation.

⚫︎ The word is typically written with the kanji 拡充. ⚫︎ The reading (hiragana) is かくじゅう. ⚫︎ There are no significant variations in the okurigana.

⚫︎ 拡大 (かくだい) - expansion, enlargement ⚫︎ 増強 (ぞうきょう) - reinforcement, strengthening ⚫︎ 拡張 (かくちょう) - extension, expansion ⚫︎ 強化 (きょうか) - strengthening, enhancement ⚫︎ 増やす (ふやす) - to increase

⚫︎ 縮小 (しゅくしょう) - reduction, decrease, contraction ⚫︎ 削減 (さくげん) - reduction, cut ⚫︎ 減少 (げんしょう) - decrease

政府は、国内のインフラを拡充するための予算を増額した。 ・Translation: The government increased the budget to expand domestic infrastructure. ・Explanation: This sentence illustrates the use of 拡充 in the context of expanding a country's infrastructure, using the word to refer to the increase in size, scope, or quality.

企業は、海外市場での事業を拡充するために、新しい支店を開設しました。 ・Translation: The company opened a new branch to expand its business in the overseas market. ・Explanation: This example demonstrates how 拡充 can describe the expansion of a company's business activities.

The word 拡充 is a compound word formed from: ⚫︎ 拡 (かく) - which means "to expand" or "to widen." ⚫︎ 充 (じゅう) - which means "to fill" or "to supply." The combination expresses the idea of filling something to a fuller extent, thus expanding or augmenting it.