This site will be taken down March 31st, 2026.

This was not an easy decision to make. For the last couple years, I have been struggling to find motivation for this site and to keep up with basic maintenance and security updates. With the rise of AI and more sophisticated tools, the usefulness of sites like this is questionable and traffic has nose-dived. I just don't have it in me to keep doing this. Thank you all for 10 years of support!

Zach

Word

けい
system; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) series
Word

系列

けいれつ
series; sequence; system; order of succession; keiretsu (conglomeration of businesses linked by cross-shareholdings)
Word

系統

けいとう
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)
Word

水系

すいけい
water system; river system; drainage system
Word

体系

たいけい
system; organization; organisation; architecture
Word

系譜

けいふ
genealogy; pedigree
Word

家系

かけい
family lineage
Word

系図

けいず
family tree; pedigree; genealogy
Word

大系

たいけい
outline; survey; compendium
Word

日系

にっけい
(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