I studied Esperanto in my university in last Summer. I expected Esperanto class would have little students. However the class had many classmates. This episode let me know the fact what many Japanese want to communicate with speakers of many languages but for Japanese or English.
As far as I heard, Japan is one of the largest countries of Esperanto-speakers(Esperantisto). I feel Japanese focus on communication by English but Esperanto-movement is present on this country.
Esperanto do not deny existence of other languages. Instead Esperanto exist to make other languages surviving.
Present globalism is linguistic imperialism of English, I think. In East Asia, that trend is remarkable. Opportunities of using English in conversation between mother-tongue speakers is increasing.
I think a language have a culture. It is impossible that we translate completely Japanese Haiku into English or the white colors of Inuit into Indonesian. Language makes culture and culture cultivate language.
The aim of Esperanto is only communication between different mother tongue speakers. Esperanto as Artificial Language has advantage on fairness each other.
I as Language otaku(geek) study Esperanto. Through Esperanto, we can know other languages and cultures.