Informations:

---

Reference books written by Eiji Ôtsuka
[2004] Otaku no Seishinshi - 1980-nendai-ron - 「おたく」の精神史　一九八〇年代論 (, Japanese)
[2016] Ni-kai no Jûnin to sono Jidai: Tenkeiki no Subculture Shishi - 二階の住人とその時代　転形期のサブカルチャー私史 (, Japanese)

---