万ばん世せい一いっ系けいMeaningsNoun1. unbroken imperial line (Yojijukugo)Kanji used万ten thousand世world一one系lineagePitch accentばんせいいっけいComposed of万ばん世せいall ages; eternityNoun一いちone; 1; best; first; foremost; beginning; start; a (single); one (of many); ace; …Numeric系けいsystem; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) seriesNoun