| Kanji 漢字 / Romaji 音韻 | Kana / Hiragana / Phonetic | Definition |
| 開校 | かいこう | (n) opening a school |
| kaikou | kaikou |
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| 開港 | かいこう | (n) open port / opening a port |
| kaikou | kaikou |
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| 開講 | かいこう | beginning a series of one's lectures / starting a new course |
| kaikou | kaikou |
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| 海溝 | かいこう | deep |
| kaikou | kaikou |
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| 邂逅 | かいこう | chance meeting |
| kaikou | kaikou |
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| 開口部 | かいこうぶ | Foramen |
| kaikoubu | kaikoubu |
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| 開囗部 | かいこうぶ | Foramen |
| kai i bu | kaikoubu |
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| 開口部 | かいこうぶ | aperture |
| kaikoubu | kaikoubu |
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| 開口一番 | かいこういちばん | at the very beginning of one's speech / the first thing (one) says after opening the mouth |
| kaikouichiban | kaikouichiban |
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| 開口一番 | かいこういちばん | (n-adv) at the very beginning of one's speech / the first thing (one) says after opening the mouth |
| kaikouichiban | kaikouichiban |
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| 開校記念日 | かいこうきねんび | (n) anniversary of the founding of the school |
| kaikoukinenbi | kaikoukinenbi |
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| 開口率 | かいこうりつ | rate of opening area (3) |
| kaikou ritsu | kaikouritsu |
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| 開校式 | かいこうしき | school opening ceremony |
| kaikou shiki | kaikoushiki |
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| 開口数 | かいこうすう | NA / numerical aperture |
| kaikou kazu | kaikousuu |
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| 開口数 | かいこうすう | numerical aperture (15) |
| kaikou kazu | kaikousuu |
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| 開高建 | かいこうたけし | Kaikou Takeshi (h) |
| kai taka ken | kaikoutakeshi |
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| 開口端補正 | かいこうたんほせい | open end correction (3) |
| kaikoutan hosei | kaikoutanhosei |
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| 化育 | かいく | (n) evolution / growth |
| ka iku | kaiku |
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| 海区 | かいく | (n) ocean sector |
| umi ku | kaiku |
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| 掻い潜る | かいくぐる | (v5r) to slip through |
| kai moguru | kaikuguru |
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| 回訓 | かいくん | (n) instructions sent in response to a question (from an embassy, consulate, etc.) |
| kai kun | kaikun |
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| 開脚 | かいきゃく | (n) with the legs spread |
| kaikyaku | kaikyaku |
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| 快挙 | かいきょ | (n) brilliant achievement |
| kaikyo | kaikyo |
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| 開局 | かいきょく | (n) opening of post-office or telephone exchange |
| kaikyoku | kaikyoku |
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| 回教 | かいきょう | (n) Islam |
| kaikyou | kaikyou |
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| 懐郷 | かいきょう | (n) nostalgia / homesickness / longing for home |
| kaikyou | kaikyou |
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| 海峡 | かいきょう | (n) channel |
| kaikyou | kaikyou |
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| 懐郷病 | かいきょうびょう | (n) homesickness |
| kaikyou byou | kaikyoubyou |
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| 回教寺院 | かいきょうじいん | mosque |
| kaikyou jiin | kaikyoujiin |
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| 回教国 | かいきょうこく | an Islamic nation |
| kaikyou kuni | kaikyoukoku |
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| 回教徒 | かいきょうと | (n) Muslim believer |
| kaikyou to | kaikyouto |
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| 懐旧 | かいきゅう | recalling the old days / nostalgia / reminiscences |
| kaikyuu | kaikyuu |
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| 階級 | かいきゅう | (n) class / rank / grade |
| kaikyuu | kaikyuu |
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| 懐旧談 | かいきゅうだん | (n) reminiscences |
| kaikyuu dan | kaikyuudan |
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| 階級意識 | かいきゅういしき | class consciousness |
| kaikyuuishiki | kaikyuuishiki |
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| 階級性 | かいきゅうせい | (n) class system |
| kaikyuu sei | kaikyuusei |
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| 階級政党 | かいきゅうせいとう | (n) class party |
| kaikyuu seitou | kaikyuuseitou |
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| 階級社会 | かいきゅうしゃかい | hierarchical society |
| kaikyuu shakai | kaikyuushakai |
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| 階級章 | かいきゅうしょう | rank insignia |
| kaikyuushou | kaikyuushou |
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| 階級闘争 | かいきゅうとうそう | class struggle |
| kaikyuu tousou | kaikyuutousou |
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