億（おく、oku）
- hundred million

億 represents the number 100 million (100,000,000) in Japanese. It's a large number and is used to express very big quantities, often in relation to money, populations, or other large-scale figures. The word itself is a unit of counting in the Japanese number system.

⚫︎一億円 Translation: 100 million yen ⚫︎世界人口は現在約八十億人です。 Translation: The world population is currently about 8 billion people. ⚫︎その会社の年間売上高は数十億円です。 Translation: That company's annual sales are in the tens of billions of yen.

This word is used to express large numbers. It's often used when talking about financial figures, populations, or measurements on a grand scale. You would use it in formal and informal contexts. When speaking, it's generally pronounced as おく.

⚫︎The word 億 is typically written using the kanji 億. ⚫︎It doesn't have variations in okurigana. ⚫︎It is always read as おく.

While there aren't direct synonyms for 億 itself, which is a specific number, you could use phrases to express similar meanings of a large quantity.

There aren't direct antonyms for 億. Instead, when talking about very small numbers you would use words such as "small (小さい)" or "little (少ない)".

そのプロジェクトには百億円の予算が割り当てられています。 ・Translation: A budget of 10 billion yen has been allocated for that project. ・Explanation: This sentence uses 億 to quantify the budget for a project, highlighting the large amount of money involved.

日本には約一億二千万人住んでいます。 ・Translation: Approximately 120 million people live in Japan. ・Explanation: This sentence uses 億 to express the approximate population of Japan, emphasizing the large population size.

The kanji 億 originated in ancient China, and was adopted into Japanese. It represents a unit in the number system, symbolizing a large quantity. Its meaning has remained consistent over time.