い
| 胃 | い | stomach | 1831 1108 |
| 胃痛 | いつう | stomach pain | |
| いい | good | ||
| 良い | よい | good, nice, pleasant, ok | |
| いえ | いえ | no; nay | |
| 委員 | いいん | committee member | 2063 813 |
| 言う | いう, ゆう | to say | |
| 言わば | いわば | so to speak | |
| 所謂 | いわゆる | the so-called, so to speak | |
| 意外 | いがい | unexpected, surprising | 1967 839 |
| 意思 | いし | intention, purpose | |
| 意志 | いし | will, volition | |
| 意識 | いしき | consciousness, senses | |
| 行き | いき | going | |
| 行き | ゆき | going | |
| 行けない | いけない | must not do, bad, wrong, not good | |
| 息 | いき | breath, tone | |
| 息切れ | いきぎれ | breathless | |
| 勢い | いきおい | force, vigor, energy, spirit | 1174 |
| 生き物 | いきもの | living thing, animal | 706 |
| 幾つ | いくつ | how many?, how old? | 2254 |
| 幾ら | いくら | how much?, how many? | 2254 |
| 医師 | いし | doctor, physician | 2110 |
| 医療 | いりょう | medical care, medical treatment | 2110 |
| 維持 | いじ | maintenance, preservation | 2255 |
| 維新 | いしん | restoration | 2255 |
| 異常 | いじょう | strangeness, abnormality, disorder | 2256 |
| 異類 | いるい | varieties, different kinds | 2256 |
| 椅子 | いす | chair | |
| 泉 | いずみ | spring, fountain | 1422 1426 |
| 以前 | いぜん | ago, since, before, previous | 2187 |
| 以来 | いらい | since, henceforth | 2187 |
| 板 | いた | board, plank | 859 |
| 偉大 | いだい | greatness | 2257 |
| 偉い | えらい | eminent, distinguished; Great! | 2257 |
| 抱く | いだく | to harbor, to entertain | |
| 悪戯 | いたずら | tease, prank, trick, practical joke | |
| 戴きます | いただきます | expression of gratitude before meals | |
| 頂く | いただく | to receive, to take food or drink (hum) | 1506 |
| 痛み | いたみ | pain, ache, sore, grief, distress | 1435 |
| 至る | いたる | to happen, to arrive, to come | 1467 |
| 至らない | いたらない | incomplete, imperfect | 1467 |
| 市 | いち | market, fair | 1933 672 |
| 市場 | いちば | marketplace | 1933 672 |
| 位置 | いち | place, situation, position, location | 969 |
| 一時 | いちじ | moment, time | |
| 一度に | いちどに | all at once | |
| 一番 | いちばん | best, first, number one | |
| 一家 | いっか | a house, a home, a family, a household | |
| 一種 | いっしゅ | a species, a kind, a variety | |
| 一瞬 | いっしゅん | a moment, an instant | |
| 一生 | いっしょう いっせい |
whole life, a lifetime, all through life | |
| 一層 | いっそう | much more, still more, all the more, one more layer | |
| 一体 | いったい | (1) one object, one body, (2) what on earth?, really?, (3) generally | |
| 一般 | いっぱん | general, liberal, universal, ordinary, average | |
| 一方 | いっぽう | (1) on the other hand, (2) meanwhile, (3) only, simple, in turn | |
| 一致 | いっち | coincidence, agreement; conformity | 2258 |
| 致す | いたす | (humble) to do | 1136 |
| 何れ | いずれ | anyhow, at any rate | |
| 何時か | いつか | sometime, someday, one day | |
| 何時でも | いつでも | (at) any time, always, at all times, never (neg.) | |
| 何時までも | いつまでも | forever, for good, eternally, as long as one likes, indefinitely | |
| 何時も | いつも | always, usually, every time, never (with neg. verb) | |
| 移動 | いどう | removal, migration, movement | 2259 |
| 移入 | いにゅう | importation | 2259 |
| 移出 | いしゅつ | exportation | 2259 |
| 移す | うつす | to move, transfer | 1263 |
| 従兄弟 | いとこ | younger cousin (male) | |
| 稲 | いね | rice-plant | 2260 |
| 稲作 | いなさく | rice crop | 1407 |
| 稲妻 | いなづま | lightning / inadzuma | 2260 |
| 居間 | いま | living room (western style) | 2261 |
| 居眠り | いねむり | dozing, nodding off | 2261 |
| 命 | いのち | command, decree, life, destiny | |
| 違反 | いはん | violation (of law), transgression, infringement, breach | 2262 |
| 違い | ちがい | difference, discrepancy | |
| 衣服 | いふく | clothes | 1119 |
| 衣食 | いしょく | livelihood, clothing and food | 1119 |
| 今に | いまに | before long, even now | |
| 今にも | いまにも | at any time, soon | |
| 否 | いや | no, nay | 1353 |
| 否定 | ひてい | denial, negation | 1353 |
| 依頼 | いらい | request, commission, dispatch; dependence, trust | 2263 516_2 |
| 依存 | いそん | dependency | 2263 |
| 依然 | いぜん | as yet, still | 2263 |
| 苛々 | いらいら | getting nervous, irritation | rs1501 |
| 入らっしゃい | いらっしゃい | welcome | 1591 |
| 岩 | いわ | rock, crag | |
| 祝い | いわい | celebration, festival | 1093 |
| 祝う | いわう | to congratulate, to celebrate | 1093 |
| インク | ink | ||
| 印刷 | いんさつ | printing | 2264 |
| 印象 | いんしょう | impression | 2264 |
| 引退 | いんたい | retirement | 699 |
| 引用 | いんよう | quotation, citation | 699 |
| 引力 | いんりょく | gravitation | 699 |