| 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 N3
78 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 戦 【セン】 war, battle, match, game, competition
- 戦域 【センイキ】 war area, battlefield, theater, theatre
- 開戦 【カイセン】 outbreak of war, starting a war
- 回戦 【カイセン】 event with ... rounds, innings, legs, etc., nth-round match (in a knockout tournament)
Kun reading compounds
- 戦 【いくさ】 war, battle, campaign, fight, troops, forces
- 戦場 【せんじょう】 battlefield, battleground
- 負け戦 【まけいくさ】 losing a battle, lost battle, battle one cannot win, battle one is doomed to lose
- 野合戦 【のがっせん】 battle in the open, battle on an open field
- 戦う 【たたかう】 to make war (on), to wage war (against), to go to war (with), to fight (with), to do battle (against), to compete (against), to struggle (against adversities, etc.), to fight, to contend, to resist
- 戦く 【おののく】 to shake (from fear, cold, excitement, etc.), to shudder, to tremble
- 戦ぐ 【そよぐ】 to rustle, to sway, to stir, to flutter
- 戦慄く 【わななく】 to tremble, to shiver, to shake
Readings
- Japanese names:
- せ
- Korean:
- jeon
Spanish
- guerra
- batalla
- lucha
- pelear
- batallar
- combatir
- luchar
Portuguese
- guerra
- batalha
- disputa
French
- guerre
- bataille
- match
| 448 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 555 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 526 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 88 | A New Dictionary of Kanji Usage |
| 1810 | Classic Nelson (Andrew Nelson) |
| 399 | Essential Kanji (P.G. O’Neill) |
| 550 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 301 | Kanji and Kana (Spahn and Hadamitzky) |
| 301 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 360 | Kanji in Context (Nishiguchi and Kono) |
| 839 | Kodansha Compact Kanji Guide |
| 2242 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1169 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1590 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1948 | Les Kanjis dans la tete (Yves Maniette) |
| 11631P | Morohashi |
| 1787 | New Japanese English Character Dictionary (Jack Halpern) |
| 2037 | New Nelson (John Haig) |
| 1929 | Remembering The Kanji (James Heisig) |
| 2079 | Remembering The Kanji, 6th edition (James Heisig) |
| 32 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 608 | Tuttle Kanji Cards (Alexander Kask) |
| 959 | 2001 Kanji |
| 4n9.2 | The Kanji Dictionary |
| 1-9-4 | SKIP code |
| 9355.0 | Four corner code |
| 3355.0 | Four corner code |
| 1-32-79 | JIS X 0208-1997 kuten code |
| 6226 | Unicode hex code |