Doubt about the 謙譲語 form


I understand that 謙譲語 is used when the subject is the speaker (myself) but
does it sound too much for example during a 自己紹介 in a sentence like:
「一年間東京に留学いたしました」? Also because it is an interview for a researcher position I
will have to talk about my project and I'm not sure about expressions like
"考えられる/言える/思われるでしょう". How do they change in 謙譲語? Also a sentences like:
「仏教的な観点から分析することでございます」 Would it be correct?




  * In my opinion, 留学いたしました and 留学しました are both okay in a self-introduction. The former may be preferred in some companies, but from my experience, a boss in a research facility tends not to expect you to use stiff humble language like this. YMMV.
  * If you are in doubt, don't use ～でございます, and stick to ～です. ございます is still used at some classy hotels and restaurants (as well as fantasy manga and such), but it is usually an overkill in a job interview. But having one or two ございます wouldn't hurt if your Japanese is fluent enough.
  * An expression of [自発](https://japanese.stackexchange.com/q/42680/5010) like 考えられます/思われます does not have a humble version. It's already indirect enough because the existence of the "thinker" is obscure in this form. To introduce an already accepted idea in your field, you can safely say ～であると考えられます ("It is believed that ～"). Even when you want to express your own opinion, ～であると考えます ("I believe/think ～") is enough in an academic context. There are humble versions of 思います/考えます (推察いたします, 存じます, 愚考します, etc.), but these are mainly for respectful business letters, not academic talks.

