Translation guide
The concept of an unbreakable determination or resolve. In Japanese, this is expressed through nouns, adjectives, and idiomatic phrases that emphasize mental strength, persistence, and unwavering spirit.
He overcame the difficulties with an iron will.
Literally 'indomitable spirit'. Emphasizes a spirit that cannot be broken, often used in motivational contexts.
Her indomitable spirit led the team to victory.
Means 'strong will'. A more common, everyday expression for determination.
With a strong will, you can achieve any goal.
Describes a person whose will is firm and unshakable. Often used to describe someone's character.
He has an iron will, so he always follows through on what he decides.
Emphasizing sustained effort and refusal to give up, often in the face of long-term challenges.
Describing a moment of firm decision or refusal to be swayed.
意志 (ishi) refers to a conscious, often rational will or volition, while 根性 (konjō) implies a more instinctive, gutsy fighting spirit. 意志 is used in formal or psychological contexts, whereas 根性 is common in sports and casual speech.
While 鉄の意志 (tetsu no ishi) is a direct translation, it can sound overly dramatic or literary in everyday conversation. For casual settings, use 強い意志 (tsuyoi ishi) or 根性 (konjō).
根性があれば、どんなトレーニングも乗り越えられる。
If you have guts, you can get through any training.
Adjective meaning 'tenacious' or 'persistent'. Describes someone who doesn't give up easily.
With her iron will, she won the contract through persistent negotiation.
Idiom meaning 'to harden one's heart' or 'to be ruthless with oneself'. Used when forcing oneself to do something difficult.
With an iron will, I resisted the sweet temptation.
He stuck to his iron will until the end.