Grammar Info

N1 Lesson 1: 11/17


When, If, Once, As

〜なったら is also used. Often in casual speech.


Noun + (1) + + なる(2)
Verb[る]+ + + なる(2)

(2) なれば


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About ともなると・にもなると

となると is a strong expression in Japanese that focuses on highlighting that once some relatively high threshold is reached, (B) will occur. While となると may be seen in several different forms, the base structure is a combination of the particle と, the う-Verb なる 'to become', and the particle と repeated in its use of highlighting a certain outcome. Standard translations are 'once (A), (B)', and 'when (A), (B)'. A more literal translation can be thought of as 'once (A) happens, it is sure to follow that (B)'.
The other forms that となると may be seen in are ともなると, となれば, and ともなれば. The primary difference being that も adds slight emphasis. While ば and と do have slightly different nuances by default, in terms of this specific grammar point, they are used completely interchangeably.
となると may be seen following nouns, or verbs in any of their standard form.
  • あなたも()ともなると(せき)()りないので、(くるま)(だい)ではなく4(だい)()くことにしましょう。
    If you are also coming, there will not be enough seats, so let's take 4 cars instead of 3.
  • 会社(かいしゃ)のウエブページを作成(さくせい)するともなれば優秀(ゆうしゅう)なプログラマーが必要(ひつよう)になるだろう。
    We would probably need good programmers, once we start working on the company website.
  • ゴールデンウィークともなると遊園地(ゆうえんち)などは()む。
    Amusement parks get crowded once Goldenweek starts.
  • 社会人(しゃかいじん)ともなれば色々(いろいろ)社会的(しゃかいてき)ルールを(まも)らなければいけなくなる。
    Once you become a member of society, there are various societal rules that you need to start following.
も may also be used following the subject of ともなると sentences, and simply places emphasis on that subject.
  • どんなつまらない観光地(かんこうち)も、週末(しゅうまつ)ともなると観光客(かんこうきゃく)(にぎ)わう。
    When the weekend starts, even the most boring tourist attractions are crowded.
Fun Fact
The emphasis that is seen in this grammar pattern is partly due to the function of the first と, and is one of the reasons that になると will not be used to convey a similar meaning. に and と are regularly used in this way in Japanese, with と almost always indicating that the outcome of something is unavoidable, cannot be controlled, is as to be expected. に merely focuses on the transition from (A) to (B).
  • 50(だい)となると(からだ)(おも)うように(うご)かなくなる。
    Once you turn 50, your body stops working like how you want it to. (Unavoidable due to age)
  • 50(だい)になると(からだ)(おも)うように(うご)かなくなる。
    Once you turn 50, your body stops working like how you want it to. (Simply stating that once you turn 50, your body won't be the same as it was before)


  • ここ普通(ふつう)漁村(ぎょそん)だが、夏休(なつやす)ともなる大勢(おおぜい)(きゃく)()て、(にぎ)やかになります。

    This is an ordinary fishing village, but when the summer vacation starts, a large number of visitors come and it becomes lively.

    AがBともなるとC is a very common pattern expressing what happens (C) when B (some special circumstances like an emergency) happens. A is often an ordinary situation, or current stage in life, etc.

  • 田中(たなか)さん普通(ふつう)のサラリーマンだが、(あぶ)なくて(あと)()状況(じょうきょう)ともなる獅子(しし)のように()(ひと)(まも)る。

    Tanaka-san is just an ordinary office worker, but when the situation is dangerous and there is no way out, he will protect others like a lion.

  • 大人(おとな)にもなる幼馴染(おさななじみ)との友情(ゆうじょう)(よわ)くなりつつあるだろう。

    Once you become an adult, the bond with childhood friends gets weaker and weaker.

  • チームリーダーに就任(しゅうにん)するともなる自分(じぶん)仕事(しごと)(かぎ)らずチームメンバーの仕事(しごと)責任(せきにん)があるだろう。

    Once you become a team leader, you will be responsible not only for your own but also for the work of team members.

  • 普段(ふだん)貪欲(どんよく)ではない(ひと)でも莫大(ばくだい)金額(きんがく)ともなる貪欲(どんよく)になるかもしれない。

    Even people who are generally not greedy might become greedy when it comes to huge amounts of money.

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ともなると・にもなると – Grammar Discussion

Most Recent Replies (2 in total)

  • FredKore


    uhh… something’s off here.
    The orange nuance text is nowhere in the grammar page…

  • Mannelito


    普段は貪欲ではない人でも、莫大な金額 *ともなると * 貪欲になるかもしれない

    Can someone help me understand why ときたら doesn’t work in this sentence or what separates them?

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