〜ともなると
Formation
Meaning
Used to describe how things change or what is required when a certain level, stage, or special situation is reached. It emphasize that once that level is attained, things are different from normal.
Note
Emphasizes that when a special stage or high level is reached, the situation or requirements become different from the usual state.
Examples
海外で生活するともなると、語学力だけでなく強い精神力も必要だ。
When it comes to living abroad, not only language skills but also strong mental fortitude is necessary.
家を建てるともなれば、多額の資金と周到な計画が必要不可欠だ。
When it comes to building a house, a large amount of funds and careful planning are indispensable.
プロとして活躍するともなると、日々の練習だけでなく体調管理も重要な仕事だ。
When it becomes a matter of performing as a professional, not only daily practice but also health management is an important task.
プロの選手ともなると、一回の試合にかける集中力が一般の人とは全然違う。
As would be expected from a professional athlete, the level of concentration they put into a single match is completely different from that of an ordinary person.
大学生ともなれば、自分の行動には自分自身で責任を持たなければならない。
Once you become a university student, you must take responsibility for your own actions.
休日ともなると、この遊園地は家族連れで非常に混雑する。
On holidays, this amusement park becomes extremely crowded with families.