Fenomena perceraian pasangan lanjut usia Jukunen Rikon masyarakat Jepang kontemporer = Later life divorce phenomenon in contemporary Japanese society

Fenomena hidden homeless dalam masyarakat Jepang kontemporer: studi kasus net caf refugees = Hidden homeless phenomenon in the contemporary Japanese society: a case study of net caf refugees

Fenomena love hotel dalam budaya Jepang kontemporer = The Phenomenon of love hotel in contemporary Japanese culture

Fenomena Kekkon Iju Josei dalam masyarakat Jepang = Phenomenon of Kekkon Iju Josei in Japanese society / Ayu Gardenia Lantang

Kajian fenomena Bankonka dalam masyarakat Jepang = Study the phenomenon Bankonka in Japanese society