| 55 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 94 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 88 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 158 | A New Dictionary of Kanji Usage |
| 2553 | Classic Nelson (Andrew Nelson) |
| 99 | Essential Kanji (P.G. O’Neill) |
| 211 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1071 | Japanese Names (P.G. O’Neill) |
| 3.14 | Japanese for Busy People |
| 117 | Kanji and Kana (Spahn and Hadamitzky) |
| 117 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 454 | Kanji in Context (Nishiguchi and Kono) |
| 1184 | Kodansha Compact Kanji Guide |
| 459 | Kodansha Kanji Dictionary (Jack Halpern) |
| 284 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 344 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 471 | Les Kanjis dans la tete (Yves Maniette) |
| 17450 | Morohashi |
| 384 | New Japanese English Character Dictionary (Jack Halpern) |
| 3133 | New Nelson (John Haig) |
| 461 | Remembering The Kanji (James Heisig) |
| 500 | Remembering The Kanji, 6th edition (James Heisig) |
| 206 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 171 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 2
JLPT level N4
200 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 海運 【カイウン】 maritime transport, shipping
- 海域 【カイイキ】 area of ocean
- 公海 【コウカイ】 high seas, international waters
- 内海 【ナイカイ】 inland sea, inlet, gulf, bay, lake
Kun reading compounds
- 海 【うみ】 sea, ocean, waters
- 海辺 【うみべ】 beach, seashore, seaside, coast
- 内海 【ないかい】 inland sea, inlet, gulf, bay, lake
- 血の海 【ちのうみ】 sea of blood, pool of blood
Readings
- Japanese names:
- あ、 あま、 うな、 うん、 え、 か、 た、 ひろ、 ひろし、 ぶ、 まち、 まま、 み、 め、 わたる
- Korean:
- hae
Spanish
- mar
- océano
- playa
Portuguese
- oceano
- mar
French
- mer
- océan
| 347 | 2001 Kanji |
| 3a6.20 | The Kanji Dictionary |
| 1-3-6 | SKIP code |
| 3815.7 | Four corner code |
| 1-19-04 | JIS X 0208-1997 kuten code |
| 6d77 | Unicode hex code |
Jōyō kanji, taught in grade 4
JLPT level N2
867 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 底 【テイ】 base (logarithmic, exponential, number system), radix, base (triangle, cone, cylinder, etc.), type, kind, extent, degree
- 底辺 【テイヘン】 base (of a polygon), bottom (of the social scale), lower levels, lower classes, base (e.g. of support), foundation, basis
- 奥底 【オクソコ】 depths, deep place, bottom (of one's heart)
- 水底 【スイテイ】 sea or river bottom
Kun reading compounds
- 底 【そこ】 bottom, sole
- 底入れ 【そこいれ】 bottoming out (of prices)
- 水底 【すいてい】 sea or river bottom
- 奥底 【おくそこ】 depths, deep place, bottom (of one's heart)
Readings
- Korean:
- ji, jeo
Spanish
- fondo
- suelo
- parte más baja
- base
Portuguese
- único
- fundo
- profundidade
- preço baixo
- base
- espécie
- tipo
French
- partie basse
- fond
- semelle
- profondeur
- prix plancher
- base
- sorte
| 475 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 576 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 549 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 791 | A New Dictionary of Kanji Usage |
| 1508 | Classic Nelson (Andrew Nelson) |
| 590 | Essential Kanji (P.G. O’Neill) |
| 508 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 992 | Japanese Names (P.G. O’Neill) |
| 562 | Kanji and Kana (Spahn and Hadamitzky) |
| 571 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 745 | Kanji in Context (Nishiguchi and Kono) |
| 585 | Kodansha Compact Kanji Guide |
| 3827 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1961 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2656 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1850 | Les Kanjis dans la tete (Yves Maniette) |
| 9262 | Morohashi |
| 3084 | New Japanese English Character Dictionary (Jack Halpern) |
| 1612 | New Nelson (John Haig) |
| 1833 | Remembering The Kanji (James Heisig) |
| 1975 | Remembering The Kanji, 6th edition (James Heisig) |
| 510 | Tuttle Kanji Cards (Alexander Kask) |
| 556 | 2001 Kanji |
| 3q5.3 | The Kanji Dictionary |
| 3-3-5 | SKIP code |
| 0024.2 | Four corner code |
| 1-36-76 | JIS X 0208-1997 kuten code |
| 5e95 | Unicode hex code |
臼
Jōyō kanji, taught in junior high
2048 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 臼蓋 【キュウガイ】 acetabular roof
- 臼蓋形成不全 【キュウガイケイセイフゼン】 acetabular dysplasia
- 烏臼 【ウキュウ】 Chinese tallow (as an ingredient in Chinese medicine)
- 亜脱臼 【アダッキュウ】 subluxation
Kun reading compounds
- 臼 【うす】 millstone, mortar
- 臼茸 【うすたけ】 shaggy chanterelle (Turbinellus floccosus), scaly chanterelle, woolly chanterelle
- 提宇子 【ダイウス】 God
- 搗き臼 【つきうす】 mortar (for pounding rice)
- 臼搗く 【うすづく】 to pound (rice, etc.)
Readings
- Korean:
- gu
Spanish
- mortero
Portuguese
French
- mortier
| 3849 | Classic Nelson (Andrew Nelson) |
| 338 | Japanese Names (P.G. O’Neill) |
| 1896 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 4341 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2957 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 2060 | Les Kanjis dans la tete (Yves Maniette) |
| 30173 | Morohashi |
| 3528 | New Japanese English Character Dictionary (Jack Halpern) |
| 4907 | New Nelson (John Haig) |
| 2063 | Remembering The Kanji (James Heisig) |
| 1531 | Remembering The Kanji, 6th edition (James Heisig) |
| 0a6.4 | The Kanji Dictionary |
| 4-6-2 | SKIP code |
| 4-5-2 | SKIP code |
| 7777.0 | Four corner code |
| 1-17-17 | JIS X 0208-1997 kuten code |
| 81fc | Unicode hex code |