Denshi Jisho — Online Japanese dictionary

カタカナ katakana; angular Japanese syllabary used primarily for loanwords
Common word, Noun, Usually written using kana alone 
カタログ catalog; catalogue
Common word, Noun, Suru verb, Usually written using kana alone 
かちかち 1:
2: (Onomatopoeic or mimetic word) ticktock;
3: (Onomatopoeic or mimetic word) chinking (e.g. of a hammer against rock); knocking; () (Onomatopoeic or mimetic word) dry and hard; (frozen) stiff;
4: (Onomatopoeic or mimetic word) hidebound; die-hard; stubborn; obstinate; bigoted;
5: (Onomatopoeic or mimetic word) scared stiff; tense; nervous; frightened
Common word, Adverb taking the 'to' particle, Adverb 
カッター cutter
Common word, Noun 
カップル couple
Common word, Noun 
カデンツ cadence (ger: Kadenz)
Common word, Noun 
カトレヤ cattleya (type of orchid)
Common word, Noun, lat: 
かどうか whether or not (in phrases like "I don't know whether or not I can come")
Common word, Expression 
カナリア canary (esp. the island canary, Serinus canaria)
Common word, Noun, Usually written using kana alone, por: 
カプセル capsule (ger: Kapsel)
Common word, Noun, No-adjective 
カプラー coupler
Common word, Noun 
かまくら mid-January festival in northern Japan, with snow huts in which children play house
Common word, Noun 
カヤック kayak
Common word, Noun, Suru verb 
カラオケ karaoke (singing to taped accompaniment)
Common word, Noun, No-adjective, Usually written using kana alone 
カラット carat; karat
Common word, Noun 
カラフル colorful; colourful
Common word, Na-adjective, Noun 
カラード colored; coloured
Common word, Noun 
カリウム potassium (K) (ger: kalium)
Common word, Noun, No-adjective 
カリスマ 1: charisma (ger: Charisma);
2: divinely conferred power or talent;
3: charismatic person
Common word, Noun, Noun or verb acting prenominally 
カルテル cartel (ger: Kartell)
Common word, Noun 
カルデラ caldera
Common word, Noun 
カルピス 1: Calpis (Japanese milk-based soft drink);
2: (Colloquialism) sperm; semen; cum
Common word, Noun 
カルメラ caramel (por: caramelo)
Common word, Noun 
カレッジ college
Common word, Noun 
カロチン carotene
Common word, Noun 
カロリー calorie
Common word, Noun, No-adjective 

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