万年筆（まんねんひつ、manneんhitsu）
- fountain pen

The word 万年筆 (まんねんひつ) refers to a fountain pen. It's a writing instrument that uses ink and a nib to write, unlike a ballpoint pen which uses a ball. The name literally translates to "ten-thousand year brush," reflecting its potential longevity and the idea that it's a writing tool meant to last a long time. The term typically encompasses all varieties of fountain pens, from basic models to high-end, luxury pens. It’s a common and widely understood term in Japanese for this specific writing tool.

⚫︎ 新しい万年筆を買いました。 Translation: I bought a new fountain pen. ⚫︎ 彼は万年筆で手紙を書くのが好きです。 Translation: He likes writing letters with a fountain pen. ⚫︎ この万年筆はインクが漏れてる。 Translation: This fountain pen is leaking ink.

You use 万年筆 in conversations when you are talking about fountain pens. It’s used similarly to how you would say "fountain pen" in English. You might use it to describe owning one, wanting to buy one, using one for writing, or discussing the features or problems associated with a fountain pen. It’s suitable for both formal and informal situations.

⚫︎ 万年筆 is primarily written using the kanji 万(man - ten thousand), 年(nen - year), and 筆(fude/hitsu - brush/pen), which is read as まんねんひつ in hiragana. ⚫︎ There is no other common way to write it. The okurigana is standard.

There aren’t really direct synonyms for 万年筆 that are widely used in modern Japanese. The term is very specific. However, if describing the function, you could say: ⚫︎ ペン(pen - pen, which is a broader term) ⚫︎ 筆記具(hikki gu - writing instrument, which is more general)

There aren’t really antonyms for 万年筆. If you’re talking about writing instruments, a contrast would be a different type of pen, but not the word itself. Here are some options: ⚫︎ ボールペン(boorupen - ballpoint pen) ⚫︎ 鉛筆(enpitsu - pencil)

この万年筆は書き味がとてもいいです。 ・Translation: This fountain pen writes very well. ・Explanation: This sentence describes the quality of writing with the fountain pen.

万年筆のインクが切れたので、新しいカートリッジを買わなければなりません。 ・Translation: Since the fountain pen ran out of ink, I have to buy a new cartridge. ・Explanation: This sentence explains a common maintenance need for fountain pens.

The word 万年筆 combines 万年(mannen - ten thousand years) and 筆(fude/hitsu - brush/pen). The "ten-thousand years" part emphasizes longevity and permanence. The 筆 or "pen/brush" part indicates the writing instrument itself, highlighting that, like a brush, it holds and dispenses ink to make marks on paper. The name likely arose to capture the perceived durability and quality of fountain pens compared to earlier writing tools.