▁II ▁m anga ▁d ō jin ▁started ▁to ▁appear ▁in ▁Japan . ▁M anga ▁artists ▁like ▁Sh ot aro ▁I sh in om ori ▁( K amen ▁R ider , ▁Cy borg ▁ 0 0 9 ) ▁and ▁F uj io ▁F uj iko ▁( D ora emon ) ▁formed ▁d ō jin ▁groups ▁such ▁as ▁F uj iko ' s ▁. ▁At ▁this ▁time ▁d ō jin ▁groups ▁were ▁used ▁by ▁artists ▁to ▁make ▁a ▁professional ▁debut . ▁This ▁changed ▁in ▁the ▁coming ▁dec ades ▁with ▁d ō jin ▁groups ▁forming ▁as ▁school ▁clubs ▁and ▁the ▁like . ▁This ▁cul min ated ▁in ▁ 1 9 7 5 ▁with ▁Com ik et ▁in ▁Tokyo . ▁ ▁D ō jin ▁today ▁Av id ▁fans ▁of ▁d ō jin ▁attend ▁regular ▁d ō jin ▁convent ions , ▁the ▁largest ▁of ▁which ▁is ▁called ▁Com ik et ▁( a ▁port man te au ▁of ▁" Com ic ▁Market ") ▁held ▁in ▁the ▁summer ▁and ▁winter ▁at ▁Tokyo ▁Big ▁S ight . ▁Here , ▁over ▁ ▁of ▁d ō jin ▁materials ▁are ▁bought , ▁sold , ▁and ▁trad ed ▁by ▁at ten de es . ▁D ō jin ▁cre ators ▁who ▁base ▁their ▁materials ▁on ▁other ▁cre ators ' ▁works ▁normally ▁publish ▁in ▁small ▁numbers ▁to ▁maintain ▁a ▁low ▁profile ▁from ▁lit ig ation . ▁This ▁makes ▁a ▁tal ented ▁cre ator ' s ▁or ▁circle ' s ▁products ▁a ▁cov et ed ▁comm od ity ▁as ▁only ▁the ▁fast ▁or ▁the ▁luck y ▁will ▁be