忍者（にんじゃ、ninja）
- ninja

The word 忍者 (にんじゃ, *nin-ja*) refers to a covert agent or mercenary in feudal Japan, skilled in stealth, espionage, and unconventional warfare. They were often employed for tasks like reconnaissance, sabotage, infiltration, and assassination. They are known for their association with secrecy and special skills. The image of the 忍者 is often romanticized in popular culture.

⚫︎ あの映画に、たくさんの忍者が登場します。 Translation: Many ninja appear in that movie. ⚫︎ 忍者の訓練は厳しいことで有名です。 Translation: The training of ninja is famous for being rigorous. ⚫︎ 忍者は、情報を集めるのが得意でした。 Translation: Ninja were skilled at gathering information.

This word is primarily used in conversation when discussing topics related to: ⚫︎ History, especially the feudal period of Japan. ⚫︎ Japanese culture and mythology. ⚫︎ Movies, anime, and games that feature ninja. You would use it to describe the historical figures or the fictional characters. You could also use it when talking about the skills or techniques associated with them, like 忍術 (にんじゅつ, *ninjutsu*).

⚫︎ The word is written using the kanji 忍者. ⚫︎ The reading is にんじゃ (*nin-ja*). ⚫︎ While the kanji 忍者 is the standard way to write it, it's very rarely written in katakana ニンジャ. The use of hiragana is also common にんじゃ.

⚫︎ There aren't direct synonyms in Japanese. However, depending on context, you might use words that describe similar roles or skills: ⚫︎ スパイ (*supai*) - spy ⚫︎ 暗殺者 (*ansatsusha*) - assassin ⚫︎ 密偵 (*mittei*) - secret agent / spy

There are no direct antonyms for 忍者. It depends on the context of usage. Words that contrast with their roles or actions might be: ⚫︎ 侍 (*samurai*) - samurai (warriors who followed a code of conduct) ⚫︎ 味方 (*mikata*) - ally / friend ⚫︎ 警察官 (*keisatsukan*) - police officer

伝説の忍者は、壁を駆け上がることができたと言われています。 ・Translation: It is said that the legendary ninja could run up walls. ・Explanation: This sentence describes the legendary ability attributed to ninja.

彼は忍者について詳しい本を読んでいます。 ・Translation: He is reading a detailed book about ninja. ・Explanation: This sentence indicates someone is studying the topic of ninja.

The word 忍者 is derived from the term 忍 (*nin*), which can mean "stealth," "secrecy," or "endurance". 者 (*sha*) means "person". Therefore, 忍者 literally translates to "a person of stealth" or "one who endures."