~に対して (contrast)
Set one side against a contrasting side
You’ll be able to contrast two people, things, or situations by setting one side against the other.

蓮が静かなのに対して、芽衣はとてもにぎやかです。
ren ga shizuka na no ni taishite, mei wa totemo nigiyaka desu.
What do you think this sentence means?
In contrast to Ren being quiet, Mei is very lively.
In contrast to another side
~に対して can mean “whereas” or “in contrast to.” In this use, it compares two parallel sides and highlights their difference.
姉は肉が好きなのに対して、私は魚が好きです。
ane wa niku ga suki na no ni taishite, watashi wa sakana ga suki desu.
My older sister likes meat, whereas I like fish.
夏は昼が長いのに対して、冬は昼が短いです。
natsu wa hiru ga nagai no ni taishite, fuyu wa hiru ga mijikai desu.
In summer the days are long, whereas in winter they are short.
Put the first side before に対して
Use noun + に対して, or a plain clause or adjective + のに対して. With a な-adjective, use ~なのに対して. The following clause describes the contrasting side. This is different from the other use of に対して, which marks the target of an action or attitude.
都会は便利なのに対して、田舎は自然が豊かです。
tokai wa benri na no ni taishite, inaka wa shizen ga yutaka desu.
Cities are convenient, whereas the countryside is rich in nature.
~に対して (target) vs ~のに対して (contrast)
After a noun, に対して usually marks who or what an attitude is aimed at. After a clause, のに対して sets two sides against each other.
~に対して, toward
兄は弟に対して厳しいです。
ani wa otouto ni taishite kibishii desu.
My older brother is strict with my younger brother.
The younger brother is the one the strictness is aimed at.
~のに対して, whereas
兄が厳しいのに対して、弟は優しいです。
ani ga kibishii no ni taishite, otouto wa yasashii desu.
My older brother is strict, whereas my younger brother is gentle.
Two people are set side by side and contrasted.
電車は時間が正確なのに対して、バスは道が混むとすぐ遅れる。
densha wa jikan ga seikaku na no ni taishite, basu wa michi ga komu to sugu okureru.
Trains keep precise time, whereas buses are quickly delayed when the roads are busy.
平日の朝は電車が混んでいるのに対して、週末はいつも空いている。
heijitsu no asa wa densha ga konde iru no ni taishite, shuumatsu wa itsumo suite iru.
On weekday mornings the trains are crowded, whereas on weekends they are always empty.
料理教室の参加者は、男性が五人だったのに対して、女性は二十人もいた。
ryouri kyoushitsu no sankasha wa, dansei ga gonin datta no ni taishite, josei wa nijuunin mo ita.
Of the cooking class participants, there were only five men, whereas there were as many as twenty women.
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