s , ▁American - style ▁newspaper ▁com ics ▁supp lement s ▁began ▁to ▁appear ▁in ▁Japan , ▁as ▁well ▁as ▁some ▁American ▁com ic ▁stri ps . ▁▁ 1 9 0 0 ▁saw ▁the ▁debut ▁of ▁the ▁J iji ▁M anga ▁in ▁the ▁J iji ▁Shin p ō ▁newspaper — the ▁first ▁use ▁of ▁the ▁word ▁" m anga " ▁in ▁its ▁modern ▁sense , ▁and ▁where , ▁in ▁ 1 9 0 2 , ▁Rak uten ▁Kit az awa ▁began ▁the ▁first ▁modern ▁Japanese ▁com ic ▁strip . ▁ ▁By ▁the ▁ 1 9 3 0 s , ▁com ic ▁stri ps ▁were ▁serial ized ▁in ▁large - cir cul ation ▁month ly ▁girls ' ▁and ▁boys ' ▁magazine ▁and ▁collected ▁into ▁hard back ▁volumes . ▁ ▁The ▁modern ▁era ▁of ▁com ics ▁in ▁Japan ▁began ▁after ▁World ▁War ▁II , ▁prop elled ▁by ▁the ▁success ▁of ▁the ▁serial ized ▁com ics ▁of ▁the ▁pro l ific ▁Os am u ▁Te zu ka ▁and ▁the ▁com ic ▁strip ▁S az ae - san . ▁ ▁Gen res ▁and ▁aud ien ces ▁divers ified ▁over ▁the ▁following ▁dec ades . ▁ ▁St ories ▁are ▁usually ▁first ▁serial ized ▁in ▁mag az ines ▁which ▁are ▁often ▁hundreds ▁of ▁pages ▁thick ▁and ▁may ▁contain ▁over ▁a ▁dozen ▁stories ; ▁they ▁are ▁later ▁compiled ▁in ▁- format ▁books . ▁ ▁At ▁the ▁turn ▁of ▁the ▁ 2 0 th ▁and ▁ 2 1 st ▁centuries , ▁nearly ▁a ▁quarter ▁of ▁all ▁printed ▁material ▁in ▁Japan ▁was