| カグ : Kagu | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| カラダーセイブツガク : Karada－Seibutsugaaku | Not written in this script, try other Japanese scripts. |
| カンコウーチホウ : Kankou－Chihou | Not written in this script, try other Japanese scripts. |
| キグ : Kigu | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| キショウ １ : Kishou １ | Not written in this script, try other Japanese scripts. |
| キュンプ : Kyanpu | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| キョウシツカツドウ : Kyoushitsu | Not written in this script, try other Japanese scripts. |
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| キョウシツカツドウ : Kyoushitsukatsudou | Not written in this script, try other Japanese scripts. |
| キンガク１ : Kingaku １ | Not written in this script, try other Japanese scripts. |
| キーブヒン : Ki－buhin | Not written in this script, try other Japanese scripts. |
| ギンコウ : Ginkou | Not written in this script, try other Japanese scripts. |
| クウコウ １ : Kuukouu １ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| クニ１ : Kuni １ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| ハーブ. : Yakusou,Kousou、Haabu | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| クダモノ１ : Kudamono1 | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| クリスマス １ : Kurisumasu １ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| クルマ １ : Kuruma １ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| ゲンゴ １ : Gengo １ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| コクセキーケイヨウシ １ : Kokuseki－Keiyoushi １ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| コクセキーケイヨウシ３ : Kokuseki－Keiyoushi３ | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| コトバーキソ : Kotoba－Kiso | Not written in this script, try other Japanese scripts. |
| コンチュウ : Konchuu | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| コンピュータ--コマンド : Konpuutaakomando | Not written in this script, try other Japanese scripts. |
| コンピューターソフタウェア : Konpuuta Sofutawea | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
| コンプーターハードウェア : Konpuutaa－Haadowea | Japanese (Katakana) to Japanese (Romaji) Quiz | Japanese (Romaji) to Japanese (Katakana) Quiz | Theory - Learn Words |
