▁able ▁to ▁get ▁them ▁before ▁they ▁sell ▁out . ▁ ▁Over ▁the ▁last ▁de cade , ▁the ▁practice ▁of ▁creating ▁d ō jin ▁has ▁expanded ▁significantly , ▁attract ing ▁thousands ▁of ▁cre ators ▁and ▁fans ▁al ike . ▁Adv ances ▁in ▁personal ▁publishing ▁technology ▁have ▁also ▁fue led ▁this ▁expansion ▁by ▁making ▁it ▁easier ▁for ▁d ō jin ▁cre ators ▁to ▁write , ▁draw , ▁promote , ▁publish , ▁and ▁dist ribute ▁their ▁works . ▁ ▁Western ▁per ception ▁In ▁Western ▁cult ures , ▁d ō jin ▁are ▁often ▁perce ived ▁to ▁be ▁derivative ▁of ▁existing ▁work , ▁analog ous ▁to ▁fan ▁fiction . ▁To ▁an ▁extent , ▁this ▁is ▁true : ▁many ▁d ō jin ▁are ▁based ▁on ▁popular ▁m anga , ▁an ime ▁or ▁video ▁game ▁series . ▁However , ▁many ▁d ō jin ▁consisting ▁of ▁original ▁content ▁also ▁exist . ▁Among ▁the ▁numerous ▁d ō jin ▁categories , ▁ ▁are ▁the ▁ones ▁getting ▁the ▁most ▁expos ure ▁outside ▁Japan , ▁as ▁well ▁as ▁within ▁Japan , ▁where ▁d ō jin sh i ▁are ▁by ▁tradition ▁the ▁most ▁popular ▁and ▁numerous ▁d ō jin ▁products . ▁ ▁Types ▁▁ ▁D ō jin sh i : ▁m anga . ▁A ▁sub - category ▁would ▁be ▁ ▁for ▁CG ▁art works . ▁ ▁: ▁games , ▁software ▁ ▁: ▁music ▁ ▁, ▁or ▁, ▁is ▁a ▁form ▁of ▁d ō jin ▁which ▁is ▁sex ually ▁explicit ▁in ▁nature . ▁ ▁Notes ▁ ▁External ▁links ▁Dou jin sh i ▁DB : ▁user - sub