(CR28) [bolze. (rit.)] 20th Century Retrospective + Satou-san to Yamada-kun Appendix (Various)
(SC11) [CHEROKEE (Maeda)] cherokee works for 20th century
(C59) [Kajishima Onsen (Kajishima Masaki)] Omatsuri Zenjitsu no Yoru Sayonara 20-Seiki (Farewell 20th Century) (Gosenzo San-e | Tenchi Muyo! GXP)
amy's 20th anniversary
(C81) [CIRCLE OUTERWORLD (Chiba Shuusaku)] Midgard 20th Anniversary (Ah! My Goddess)
(C84) [COUNTER ATTACK (Gyakushuu Takeshi)] Pink Sugar 20th Anniversary Special (Bishoujo Senshi Sailor Moon)
(C81) [CIRCLE OUTERWORLD (Chiba Shuusaku)] Midgard 20th Anniversary (Ah! My Goddess) [English] [SaHa]
[Ekakigoya Notesystem (Nanjou Asuka)] Kitsch 20th Issue (Xenosaga)
[MOMONGA CLUB] 20th Anniversary & Interbreedery Art Book
