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効果 is an exact match with one form of the following word:
効果
BOOST
Reading : こうか   
1. effect; effectiveness; efficacy; result
noun
2. effects (e.g. sound effects, visual effects, special effects)  (see also: 音響効果:おんきょうこうか)
My mastery:
My current mastery of 効果:
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My flashcards:
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Usefulness and usage:
• Kanshudo usefulness level: 2 (among the 1,500 most useful words in Japanese)
• Kanshudo usefulness level is based on a usefulness score of 155,579 which gives a rank of 514
効果 is the most useful form. 1 additional form is shown below.
This word is a member of our collection of the 10,000 most useful words in Japanese:
• This form is almost always used
• Google Japan frequency rank: 2,000 (about 393,000,000 results)
• This form appears in Wikipedia's list of JLPT N3 vocabulary (see JLPT collections)
• Kanshudo JLPT value = N3
• iknow! Core 6000 rank: 1376 (see iKnow! collections)
• Wikipedia most common 20000 words rank: 921
• This form appears in the 1998 'Ichimango goi bunruishuu' frequent word list by Senmon Kyouiku
• This form appears in the 24,000 words in the Mainichi Shimbun frequency analysis by Alexandre Girardi
• This form is in band 1 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
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Example sentences:
くすり
薬
の
こうか
効果
は
き
消
えていた
。
The effect of the drug had worn off.
その
くすり
薬
はすぐに
こうか
効果
を
しめ
示
した
。
The medicine had an immediate effect.
ちょうさ
調査
きかん
機関
がその
こうか
効果
を
しら
調
べた
。
A research organization investigated the effect.
こうか
BOOST
My flashcards:
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Usefulness and usage:
• This form is rarely used
• Google Japan frequency rank: 37,000 (about 15,300,000 results)
• This form appears in the 1998 'Ichimango goi bunruishuu' frequent word list by Senmon Kyouiku
• This form appears in the 24,000 words in the Mainichi Shimbun frequency analysis by Alexandre Girardi
• This form is in band 1 in the EDICT word frequency file (bands go from 1-48, where 1 is most common - each contains about 500 words)
VIEW INFLECTIONS
効
コウ   effective   きく to be effective   
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力
リョク   リキ   ちから effort; power   
交
コウ   mix; mixed   まぜる to mix, stir   まざる    まじる to be mixed together   まじえる to mix, intersperse   まじわる to intersect   かう to take turns   かわす to exchange   
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六
ロク   むっつ six   むつ    むい    む    
父
フ   ちち father   
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ハ
katakana 'ha'; eight
乂
crossed swords
果
カ    result   はたす to carry out   はて end, extremity   はてる to come to an end   
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田
デン   た rice field   
木
モク   ボク   き    こ- tree   
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大
ダイ   タイ   おおきい big   おおいに very much   おお-    
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一
イチ   イツ   ひとつ    ひと- one   
人
ジン   ニン   ひと person   
丨
stick   
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