イルカは<span class='vocab-popout' data-vocab-id='399'>動物（どうぶつ）</span>の<span class='vocab-popout' data-vocab-id='278'>中（なか）</span>で<span class='vocab-popout' data-vocab-id='1065'>頭（あたま）</span>が<span class='vocab-popout' data-vocab-id='254'>一番（いちばん）</span><span class='gp-popout vocab-popout' data-gp-id='7' data-vocab-id='16'>いい</span><strong>ということだ</strong>。

田中（たなか）<span class='vocab-popout' data-vocab-id='113'>さん</span>と山田（やまだ）<span class='vocab-popout' data-vocab-id='113'>さん</span>は、秘密（ひみつ）で付（つ）き合（あ）っている<strong>ということだ</strong>。

<span class='vocab-popout' data-vocab-id='300'>人（ひと）</span>によって考（かんが）え<span class='vocab-popout' data-vocab-id='630'>方（かた）</span>が<span class='vocab-popout' data-vocab-id='1013'>違（ちが）う</span><strong>ということだ</strong>。

<span class='gp-popout vocab-popout' data-gp-id='11' data-vocab-id='149'>それ</span>はただ<span class='vocab-popout' data-vocab-id='623'>文化（ぶんか）</span>が<span class='vocab-popout' data-vocab-id='1013'>違（ちが）う</span><strong>ということだ</strong>。

忍耐（にんたい）<span class='vocab-popout' data-vocab-id='358'>先生（せんせい）</span>によりますと、ガンの治療（ちりょう）方法（ほうほう）がとうとう見（み）つかった<strong>ということです</strong>。

<span class='gp-popout vocab-popout' data-gp-id='11' data-vocab-id='149'>それ</span>は君（きみ）がミスをした<strong>ということ<span class='vocab-popout' data-vocab-id='154'>だ</strong>から</span>、謝（あやま）った方（ほう）が<span class='gp-popout vocab-popout' data-gp-id='7' data-vocab-id='16'>いい</span>。

忍耐（にんたい）<span class='vocab-popout' data-vocab-id='358'>先生（せんせい）</span>によれば、タイムマシンが開発（かいはつ）された<strong>ということだ</strong>。

悪気（わるぎ）はない<strong><strong>ということだ</strong></strong><span class='vocab-popout' data-vocab-id='154'>から</span>、許（ゆる）してあげよう<span class='gp-popout' data-gp-id='78'>よ</span>。

今回（こんかい）は失敗（しっぱい）だったけど、<span class='gp-popout vocab-popout' data-gp-id='24' data-vocab-id='627'>新（あたら）しい</span>ことにチャレンジした<strong>ということだ</strong>。

証人（しょうにん）によると、記者（きしゃ）は怒（おこ）った忍耐（にんたい）<span class='vocab-popout' data-vocab-id='358'>先生（せんせい）</span>に攻撃（こうげき）された<strong>ということだ</strong>。

苦（くる）しいことも<span class='vocab-popout' data-vocab-id='676'>ある</span>。<span class='vocab-popout' data-vocab-id='166'>でも</span><span class='gp-popout vocab-popout' data-gp-id='11' data-vocab-id='149'>それ</span>が生（い）きる<strong>ということだ</strong>。

<span class='vocab-popout' data-vocab-id='590'>意見（いけん）</span>を言（い）ってはいけない<strong>ということ</strong><strong>ではなくて</strong>、<span class='vocab-popout' data-vocab-id='236'>もっと</span>冷静（れいせい）に話（はな）してほしい。

ということだ vs. というものだ vs. というわけだ

<div class='writeup-body'>Like ということ, an expression used for nominalizing a phrase in the fashion of 'the ~ that ~', <span class='gp-popout' data-gp-id='216'>ということだ</span> makes use of the <span class='info-highlight' data-term='助動詞・じょどうし'>auxiliary verb</span> <span class='gp-popout' data-gp-id='1'>だ</span> (or <span class='gp-popout' data-gp-id='2'>です</span>), and stresses that the nominalized phrase 'is' the case. This phrase is often translated as 'I heard that', or 'it is said that', but literally, it is closer to 'it is that it's ~'. The <span class='gp-popout' data-gp-id='1'>だ</span> is what gives this expression a high degree of certainty, therefore implying that the speaker has heard the statement elsewhere, and is sure of its validity.<br><span class='gp-popout' data-gp-id='216'>ということだ</span> can be added to the end of any phrase that the speaker wants to highlight as being something that is known.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'><span class='gp-popout' data-gp-id='30'>この</span>井戸（いど）水（みず）は汚染（おせん）され<span class='gp-popout' data-gp-id='764'>ている</span><span class='gp-popout' data-gp-id='216'>ということだ</span>。</div><div class='writeup-example--english'>It is said that this well is contaminated.</div></li><li class='writeup-example'><div class='writeup-example--japanese'><span class='gp-popout' data-gp-id='30'>この</span>魚（さかな）は<span class='gp-popout' data-gp-id='439'>全（まった）く</span>臭（くさ）く<span class='gp-popout' data-gp-id='439'>ない</span>。<span class='gp-popout' data-gp-id='72'>まだ</span>新鮮（しんせん）<span class='gp-popout' data-gp-id='216'>と言（い）う事（こと）だ</span>。</div><div class='writeup-example--english'>This fish doesn't smell at all. It means that it's fresh.</div></li></ul>ということだ is regularly paired with other expressions that show the 'source' of information, such as によると, or <span class='gp-popout' data-gp-id='204'>によれば</span>.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>先生（せんせい）<span class='gp-popout' data-gp-id='204'>によると</span>、<span class='gp-popout' data-gp-id='30'>この</span>病気（びょうき）は薬（くすり）では治（なお）せない<span class='gp-popout' data-gp-id='216'>ということだ</span>。</div><div class='writeup-example--english'>According to the doctor, (it is said that) this sickness cannot be cured with medicine.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>大阪（おおさか）府警（ふけい）<span class='gp-popout' data-gp-id='204'>によれば</span>、犯人（はんにん）は<span class='gp-popout' data-gp-id='72'>まだ</span>逃（に）げている<span class='gp-popout' data-gp-id='216'>ということだ</span>。</div><div class='writeup-example--english'>It is said that the criminal is still on the run, according to the Osaka prefectural police.</div></li></ul>When ということだ is being used to express hearsay (statements that cannot easily be proven), it can be be rephrased as とのことだ. The literal difference between these two phrases is as follows:<br>ということだ - It can be explained that (A) is ~ (more emphasis on the information)<br>とのことだ - The statement of (A) has been applied to ~ (more emphasis on the source that 'applied' the information)<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>地域（ちいき）<span class='gp-popout' data-gp-id='214'>によって</span>ルール<span class='gp-popout' data-gp-id='10'>が</span>違（ちが）う<span class='gp-popout' data-gp-id='216'>ということだ</span>。</div><div class='writeup-example--english'>It means that the rules differ depending on the area.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>地域（ちいき）<span class='gp-popout' data-gp-id='214'>によって</span>ルール<span class='gp-popout' data-gp-id='10'>が</span>違（ちが）う<span class='gp-popout' data-gp-id='216'>とのことだ</span>。</div><div class='writeup-example--english'>It is said that the rules differ depending on the area.</div></li></ul><div class='writeup-caution'><div class='caution-header'>Caution</div><span class='gp-popout' data-gp-id='216'>ということだ</span> is considered to be more formal than <span class='gp-popout' data-gp-id='200'>そうだ</span>when reporting information that has been heard from another source. This is primarily due to <span class='gp-popout' data-gp-id='216'>ということだ</span> expressing something that is thought to be a fact, while <span class='gp-popout' data-gp-id='200'>そうだ</span>retains the nuance of being something that is a speculation/guess.<ul class='writeup-examples--holder'><li class='writeup-example'><div class='writeup-example--japanese'>彼（かれ）は家族（かぞく）に内緒（ないしょ）<span class='gp-popout' data-gp-id='36'>で</span>旅行（りょこう）<span class='gp-popout' data-gp-id='31'>に行（い）った</span>そうだ。</div><div class='writeup-example--english'>I heard that he went on a trip without telling his family.</div></li><li class='writeup-example'><div class='writeup-example--japanese'>彼（かれ）は家族（かぞく）に内緒（ないしょ）<span class='gp-popout' data-gp-id='36'>で</span>旅行（りょこう）<span class='gp-popout' data-gp-id='31'>に行（い）った</span><span class='gp-popout' data-gp-id='216'>ということだ</span>。</div><div class='writeup-example--english'>It is said that he went on a trip without telling his family.</div></li></ul></div></div>

Grammar Info

と言(い)う事(こと)だ

I heard that, rumor has it that, it is said that, it means that