You can normally translate “See you later.” into “Ja Matane”/「じゃあ、またね」 or “Sayonara”/「さようなら」. We have many different ways to say “See you later.” in Japanese. I will introduce 7 actual and natural ways to say it in Japanese.
They can be divided into formal and casual style.
1. Formal style
If you would like to work in Japan, you would often use formal expressions in various situations.
(1) Osakini Sitsureisimasu/お先さきに失礼しつれいします
This is a very polite expression and we say it in the workplace. When you leave for your house from your workplace after work, you can say “Osakini Sitsureisimasu”/「お先に失礼します」to your bosses and your elderly colleagues. Normally you don’t say it to your subordinates or younger colleagues. O/お and Masu/ます are polite languages. Sakini/先に means “first” and Sitsureisuru/失礼する means “leave”. Normally we reply “Otsukaresamadeshita”/「お疲れ様でした」toward “Osakini Sitsureisimasu”/「お先に失礼します」.
This is also a formal expression and you can say it not only to your bosses and elderly colleagues but also your subordinates and younger colleagues in the workplace. O/お and Deshita/でした are polite languages. If you translate 「お疲れ様」 into English directly, it means “Good work”. But in daily life you can often also say it in private when you part ways with someone. Normally we reply “Otsukaresamadeshita”/「お疲れ様でした」toward “Otsukaresamadeshita”/「お疲れ様でした」.
(3) Mata Zehi/また是非ぜひ
We don’t say it in the workplace. Normally we say “Mata Zehi”/「また是非」when we part ways with someone whom we don’t know very well, elderly people and so on. We reply “Arigatogozaimashita”「ありがとうございました」which means “Thank you.”, “Tanoshikattadesu”/「楽しかったです」which means “I enjoyed with you.” and so on toward “Mata Zehi”/「また是非」normally if someone whom we don’t know very well says “Mata Zehi”/「また是非」to you. If younger people say it to you, you can use casual expressions as follows.
2. Casual style
If you use casual expressions when you talk with your friends, you may get closer to them.
We also say “Otsukare”/「お疲れ」. This has the same meaning. Originally we say “Otsukaresama”/「お疲れ様」to subordinates and younger colleagues in the workplace. But now you can say it to friends also in private. Normally we reply “Otsukaresamadeshita”/「お疲れ様でした」if your bosses and elderly people say “Otsukare”/「お疲れ」to you.
(2) Ja Matane/じゃあ、またね
We can also say “Ja”/「じゃあ」, “Jane”/「じゃあね」and ”Matane”/「またね」. They have the same meaning. Normally we say it in private when we part ways with friends.
(3) Mata Kondone/また今度こんどね
Normally we say it in private when we part ways with friends.
(4) Bye Bye/バイバイ
Normally we say it in private while waving a hand when we part ways with friends.
In workplace you can say “Osakini Sitsureisimasu”/「お先に失礼します」or “Otsukaresamadeshita”/「お疲れ様でした」as a very polite style. In private you can say “Otsukaresamadeshita”/「お疲れ様でした」or “Mata Zehi”/「また是非」.
In both workplace and private you can say “Otsukaresama”/「お疲れ様」or “Otsukare”/「お疲れ」. In private you can say “Ja Matane”/「じゃあ、またね」, “Ja”/「じゃあ」, “Jane”/「じゃあね」, ”Matane”/「またね」, Mata Kondone/また今度ね or Bye Bye/バイバイ.