7 strokes
silk 糸 (糹)
lineage, system
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


Mandarin Chinese (pinyin):
xi4, ji4


  • sistema
  • conexión
  • relación
  • linaje


  • linhagem
  • sistema


  • 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