such a cultural facts ---> such a cultural fact（こんな言い方しないけど）
Though, I, as an expert, asserts ---> However, I, as an expert, asserts（本当は I would argue ぐらいにしたい）
the theme of love . . . are modernized ---> the theme of love . . . is modernized.
表現としておかしいものを挙げていくときりがないが、目に余るところだけあげると
make researches on ---> conduct [do] research into [on]
have scarce knowledge ---> have little knowledge
as if a representative of Japanese scholarship ---> as if he were [was] a representative of Japanese academia（これ自体英語の表現になじまない）
