| 295 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 204 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 187 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 23 | A New Dictionary of Kanji Usage |
| 619 | Classic Nelson (Andrew Nelson) |
| 185 | Essential Kanji (P.G. O’Neill) |
| 136 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 298 | Japanese Names (P.G. O’Neill) |
| 2.13 | Japanese for Busy People |
| 198 | Kanji and Kana (Spahn and Hadamitzky) |
| 198 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 350 | Kanji in Context (Nishiguchi and Kono) |
| 320 | Kodansha Compact Kanji Guide |
| 3707 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1897 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2578 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 182 | Les Kanjis dans la tete (Yves Maniette) |
| 3294 | Morohashi |
| 2987 | New Japanese English Character Dictionary (Jack Halpern) |
| 717 | New Nelson (John Haig) |
| 180 | Remembering The Kanji (James Heisig) |
| 192 | Remembering The Kanji, 6th edition (James Heisig) |
| 54 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 133 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 2
JLPT level N4
15 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 同 【ドウ】 the same, the said, likewise
- 同意 【ドウイ】 agreement, consent, approval, assent, same opinion, same view, same meaning
- 合同 【ゴウドウ】 combination, union, joining, incorporation, amalgamation, merger, fusion, combined, joint, united, shared, congruence
- 大同 【ダイドウ】 general resemblance, being largely the same, uniting with a common goal, Daidō era (806.5.18-810.9.19)
Kun reading compounds
- 同じ 【おなじ】 same, identical, equal, alike, equivalent, anyway, in any case, if one must ..., if one has to ..., as long as ...
- 同じく 【おなじく】 in the same way, like, likewise, similarly
Readings
- Korean:
- dong
Spanish
- mismo
- igual
- compañero
- idéntico
- similar
Portuguese
- mesmo
- concorda
- igual
French
- identique
- similaire
- égal
| 3649 | 2001 Kanji |
| 2r4.2 | The Kanji Dictionary |
| 3-2-4 | SKIP code |
| 7722.0 | Four corner code |
| 1-38-17 | JIS X 0208-1997 kuten code |
| 540c | Unicode hex code |
lineage, system
- On:
- ケイ
Jōyō kanji, taught in grade 6
JLPT level N1
567 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 系 【ケイ】 system, lineage, group, corollary, system (range of strata that correspond to a particular time period), (taxonomical) series
- 系統 【ケイトウ】 system, lineage, ancestry, family line, group (e.g. of colors) (colours), family (e.g. of languages), party, school (of thought), close (evolutionary) relationship, a population sharing a common ancestor (in genetics), strain (e.g. bacterial)
- 日系 【ニッケイ】 (of) Japanese descent, non-Japanese of Japanese descent, nikkeijin, company, etc. set up with Japanese capital, company managed by Japanese or non-Japanese of Japanese descent
- 水系 【スイケイ】 water system, river system, drainage system
Readings
- Korean:
- gye
Spanish
- sistema
- conexión
- relación
- linaje
Portuguese
- linhagem
- sistema
French
- lignée
- système
| 765 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 855 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 844 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 786 | A New Dictionary of Kanji Usage |
| 195 | Classic Nelson (Andrew Nelson) |
| 634 | Essential Kanji (P.G. O’Neill) |
| 1617 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 977 | Japanese Names (P.G. O’Neill) |
| 908 | Kanji and Kana (Spahn and Hadamitzky) |
| 930 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 449 | Kanji in Context (Nishiguchi and Kono) |
| 1504 | Kodansha Compact Kanji Guide |
| 2443 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1236 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1701 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1403 | Les Kanjis dans la tete (Yves Maniette) |
| 27223 | Morohashi |
| 1944 | New Japanese English Character Dictionary (Jack Halpern) |
| 4433 | New Nelson (John Haig) |
| 1391 | Remembering The Kanji (James Heisig) |
| 1492 | Remembering The Kanji, 6th edition (James Heisig) |
| 849 | Tuttle Kanji Cards (Alexander Kask) |
| 2241 | 2001 Kanji |
| 6a1.1 | The Kanji Dictionary |
| 2-1-6 | SKIP code |
| 4-7-4 | SKIP code |
| 2-4-3 | SKIP code |
| 2090.3 | Four corner code |
| 1-23-47 | JIS X 0208-1997 kuten code |
| 7cfb | Unicode hex code |