<span class='vocab-popout' data-vocab-id='844'>社長（しゃちょう）</span>「<span class='vocab-popout' data-vocab-id='824'>皆（みな）さん</span>がチームの一員（いちいん）として協力（きょうりょく）<span class='chui'>すれば</span><strong>こそ</strong>成功（せいこう）できるのです。」

<span class='vocab-popout' data-vocab-id='277'>両親（りょうしん）</span>が<span class='vocab-popout' data-vocab-id='501'>子（こ）</span>どもを叱（しか）るのは<span class='vocab-popout' data-vocab-id='501'>子（こ）</span>どもの幸福（こうふく）を<span class='chui'>考（かんが）えれば</span><strong>こそ</strong>だ。

悲（かな）しみが<span class='chui'><span class='gp-popout vocab-popout' data-gp-id='19' data-vocab-id='563'>あれ</span>ば</span><strong>こそ</strong>、喜（よろこ）びも<span class='vocab-popout' data-vocab-id='676'>ある</span>。

<span class='vocab-popout' data-vocab-id='637'>日本語（にほんご）</span>の<span class='vocab-popout' data-vocab-id='397'>勉強（べんきょう）</span>は<span class='chui'>難（むずか）しければ</span><strong>こそ</strong>、却（かえ）ってやりがいを<span class='vocab-popout' data-vocab-id='592'>感（かん）じる</span>のです。

人間（にんげん）の寿命（じゅみょう）は限（かぎ）られている。<span class='chui'>で<span class='gp-popout vocab-popout' data-gp-id='19' data-vocab-id='563'>あれ</span>ば</span><strong>こそ</strong>、人間（にんげん）は<span class='gp-popout vocab-popout' data-gp-id='37' data-vocab-id='148'>その</span>命（いのち）をできる<span class='gp-popout vocab-popout' data-gp-id='43' data-vocab-id='259'>だけ</span>楽（たの）しく快適（かいてき）で充実（じゅうじつ）して過（す）ご<span class='vocab-popout' data-vocab-id='141'>そう</span>と<span class='vocab-popout' data-vocab-id='582'>思（おも）う</span>。

「<span class='vocab-popout' data-vocab-id='850'>私（わたし）たち</span>は<span class='vocab-popout' data-vocab-id='416'>友達（ともだち）</span><span class='chui'>で<span class='gp-popout vocab-popout' data-gp-id='19' data-vocab-id='563'>あれ</span>ば</span><strong>こそ</strong>、X<span class='vocab-popout' data-vocab-id='113'>さん</span>の計画（けいかく）に反対（はんたい）なんです。」

<span class='vocab-popout' data-vocab-id='327'>会議（かいぎ）</span>で批判（ひはん）に従（したが）ったせりふ：「辛辣（しんらつ）な<span class='vocab-popout' data-vocab-id='953'>言葉（ことば）</span>でしょうが、わが社（しゃ）を<span class='vocab-popout' data-vocab-id='576'>心配（しんぱい）</span><span class='chui'>すれば</span><strong>こそ</strong>の苦言（くげん）です。」

<div class='writeup-body'><span class='gp-popout' data-gp-id='879'>ばこそ</span> will be used in a similar way to からこそ, indicating that (A) is the the precise reason for (B). It will be translated as 'precisely because of (A)', or 'it is only due to (A) that (B)'. This pattern is a combination of the <span class='info-highlight' data-term='接続助詞・せつぞくじょし'>conjunction particle</span> ば, and the <span class='info-highlight' data-term='副助詞・ふくじょし'>adverbial particle</span> こそ, which is being used in a similar way to a <span class='info-highlight' data-term='終助詞・しゅうじょし'>sentence ending particle</span> in this case.<br>
<span class='gp-popout' data-gp-id='879'>ばこそ</span> may follow almost any word type that has been adjusted into its <span class='info-highlight' data-term='仮定形・かていけい'>hypothetical form</span>. However, it will appear as であればこそ when used after nouns or な-Adjectives.<ul class='writeup-examples--holder'>
 <li class='writeup-example'>
<div class='writeup-example--japanese'>
娘（むすめ）の将来（しょうらい）を思（おも）え<span class='gp-popout' data-gp-id='879'>ばこそ</span>、塾（じゅく）に通（かよ）わせます。</div><div class='writeup-example--english'>
Precisely because I am thinking about my daughter's future, I will make her attend cram school.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>


忙（いそが）しけれ<span class='gp-popout' data-gp-id='879'>ばこそ</span>時間（じかん）を効率的（こうりつてき）に使（つか）うことができるようになる。</div><div class='writeup-example--english'>
Precisely because you are busy, you will be able to use your time more efficiently.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>


健康（けんこう）であれ<span class='gp-popout' data-gp-id='879'>ばこそ</span>、年（とし）をとっても楽（たの）しい人生（じんせい）を過（す）ごせる。</div><div class='writeup-example--english'>
You will be able to enjoy life even if you grow old, precisely because of good health.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>


小（ちい）さな会社（かいしゃ）であれ<span class='gp-popout' data-gp-id='879'>ばこそ</span>、優秀（ゆうしゅう）な人材（じんざい）が必要（ひつよう）だ。</div><div class='writeup-example--english'>
Precisely because it is a small company, we need the best workers.</div></li></ul>
In many cases, (A) will be a reason that is difficult to conceive of as what would lead to (B) under normal circumstances, and therefore requires the speaker to emphasize it with こそ.
<div class='writeup-caution'><div class='caution-header'>Caution</div><span class='gp-popout' data-gp-id='879'>ばこそ</span> is very formal, and a bit old-fashioned, so からこそ will almost always be the preferred choice in modern day Japanese.</div></div>

Grammar Info

ばこそ

precisely because, only because, because, due to