The core meaning
家族とともに暮らす means living together with one's family. 年齢とともに考え方が変わる means thinking changes as age increases. In both uses, two things are presented as moving alongside each other. The phrase is relatively formal and appears in speeches, articles and careful explanations.
| Japanese | Romaji | Meaning |
|---|---|---|
| 家族とともに新しい町で暮らしています。 | Kazoku to tomoni atarashii machi de kurashite imasu. | I live in a new town with my family. |
| 時間とともに、空の色が変わった。 | Jikan to tomoni, sora no iro ga kawatta. | The sky's color changed as time passed. |
How to form it
For accompaniment, use a noun + とともに: 家族とともに, 友人とともに. For parallel change, a noun can name the changing dimension: 時間とともに, 年齢とともに. A dictionary-form verb can also precede とともに, as in 人口が増えるとともに需要も増えた. This verb form often describes simultaneous development.
| Use | Japanese form | Meaning |
|---|---|---|
| People | 家族とともに | Together with family |
| Time | 時間とともに | As time passes |
| Verb | 増えるとともに | As it increases |
Natural examples
Read each sentence for the relationship between the first idea and the second. The English translation gives a natural meaning, while the Japanese wording shows exactly where the pattern attaches.
| Japanese | Romaji | Meaning |
|---|---|---|
| 年齢とともに、好みも変わります。 | Nenrei to tomoni, konomi mo kawarimasu. | Our preferences change as we age. |
| 利用者が増えるとともに、質問も増えた。 | Riyōsha ga fueru to tomoni, shitsumon mo fueta. | As the number of users grew, questions also increased. |
Compare the nearby pattern
家族と一緒に旅行した is natural in everyday speech. 家族とともに旅行した is more formal or literary. 時間とともに色が変わった describes gradual parallel change; 時間がたったから色が変わった asserts a causal reason more directly.
| Japanese | Romaji | Meaning |
|---|---|---|
| 家族と一緒に旅行しました。 | Kazoku to issho ni ryokō shimashita. | I traveled with my family. |
| 時間とともに町の景色が変わりました。 | Jikan to tomoni machi no keshiki ga kawarimashita. | The town's appearance changed over time. |
The two examples may describe similar situations, but they lead the listener to different conclusions. Choose the form that matches the claim you really intend to make.
Common mistake to avoid
Do not use とともに to claim a proven cause when you only observe two things changing together. Likewise, avoid it for a single sudden switch with no continuing process. In those cases, ので, たら or a direct statement may be clearer.
- Can mark accompaniment
- Can mark parallel change
- Noun or dictionary verb + とともに
- More formal than と一緒に
Try it yourself
Write one sentence about doing something with a person, then one about a change over time. Use とともに in both and explain which reading each sentence has.
Say your sentence once slowly while looking at the Japanese pattern. Then say it again without reading. If your second clause changes from a possibility to a fact, or from advice to a requirement, revise it so the grammar still matches your meaning.