電気
Denki refers to electricity as a form of energy or the electric lights in a room. It is a fundamental word used both for power and for the everyday action of turning lights on and off.
Examples
3 of 5部屋の電気をつけてください。
Please turn on the light in the room.
電気代のお支払いについてのご案内です。
This is a notice regarding the payment of your electricity bill.
あ、電気消すの忘れた!
Oh, I forgot to turn off the light!
Word Family
Memory Tip
Remember that 'Den' comes from the kanji for lightning (電). Lightning is nature's electricity!
Quick Quiz
寝る前に___を消してください。
Correct!
The correct answer is: 電気
Examples
部屋の電気をつけてください。
everydayPlease turn on the light in the room.
電気代のお支払いについてのご案内です。
formalThis is a notice regarding the payment of your electricity bill.
あ、電気消すの忘れた!
informalOh, I forgot to turn off the light!
電気エネルギーは磁力に変換することができます。
academicElectrical energy can be converted into magnetic force.
当社は新しい電気自動車のプロジェクトを開始しました。
businessOur company has started a new electric vehicle project.
Word Family
Common Collocations
Common Phrases
電気系統
electrical system
電気工事
electrical work
電気屋
electronics store / electrician
Often Confused With
Tenki means 'weather', while Denki means 'electricity'. They only differ by the first consonant sound.
Genki means 'energy/health' in a personal or physical sense, whereas Denki is literal electrical energy.
Usage Notes
Use 'tsukeru' for turning on the light and 'kesu' for turning it off. In casual conversation, 'denki' often implies the overhead light in a room.
Common Mistakes
Learners often say 'hiraku' (to open) or 'shimeru' (to close) for lights, but you must use 'tsukeru' and 'kesu'.
Memory Tip
Remember that 'Den' comes from the kanji for lightning (電). Lightning is nature's electricity!
Word Origin
Derived from the Chinese characters 電 (lightning) and 気 (spirit/energy/air).
Grammar Patterns
Cultural Context
In Japan, there is a strong cultural emphasis on 'setsuden' (saving electricity), especially during peak summer and winter months.
Quick Quiz
寝る前に___を消してください。
Correct!
The correct answer is: 電気
Related Words
保護
A1The act of keeping someone or something safe from harm, damage, or loss by providing care or creating boundaries. It is a versatile term in Japanese used for social welfare, environmental conservation, and digital security.
革命
A1A fundamental and sudden change in political power or social structure, often involving a shift in governance. It also refers to a major, transformative shift in technology, thought, or a specific field that completely alters how things are done.
拡大
A1The act of making something larger in size, scale, or scope. It is frequently used for physical enlargement (like a photo) or abstract growth (like a business or a problem).
販売
A1The act of selling goods or services to customers, typically within a commercial or professional context. It refers to the business process of making items available for purchase.
取引
A1A transaction or business deal involving the exchange of money, goods, or services. It refers to the process of doing business with another party or making a trade.
貯金
A1The act of saving money or the amount of money saved, typically in a bank or a piggy bank. It refers to setting aside funds for future use rather than spending them immediately.
借金
A1A sum of money that is borrowed from a person or an institution and is expected to be paid back. It refers to the state of owing money or the specific amount of debt accumulated.
利益
A1Refers to the financial profit a company or individual makes after deducting expenses. It also describes a general benefit, advantage, or gain that someone receives from a situation or action.
損失
A1A formal noun referring to the loss of something valuable, such as money, property, or time. It is commonly used in business or serious contexts to describe a reduction in value or a disadvantageous outcome.
予算
A1A budget or an estimate of the amount of money available for a specific purpose. It refers to the financial plan or limit set before spending occurs in personal, business, or government contexts.
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