入社 equivalent for a research internship


When writing in some formal Japanese CV (学歴/職歴), it is common to be asked to
put each job/university/etc. on a single dated line, with a second line to
indicate when one quit/graduated/dropped-out/etc. E.g:

> 平成２０年 ４月 １日 東京大学情報学部 **入学**
>
> 平成２４年 ３月３１日 同上 **卒業**
>
> 平成２４年 ４月 １日 松下電器産業株式会社 **入社**

etc.

University enrollment will be 入学/卒業, post-grad would be 進学/卒業, job would be
入社/退社...

My question is then:

**What is a proper equivalent to indicate _a research internship_?**

That is a non-paying, temporary research position in a public (government-run)
lab facility that is _not_ a university (国立研究所). In such a case, it seems that
both 入社 and 入学 would not fit. 入所 sounds like it _might_ be a possibility, but
also may be a complete mistranslation (since the word also exists for
completely different situations).

I would welcome any suggestions, (preferably) with pointers to approved
examples or other authoritative sources...




To answer my own question (after receiving the answer from somewhere else at
the time), the proper term would be: **滞在開始**.

E.g.:

> 平成２４年 ３月０１日 松下電器産業株式会社にインターンシッププログラムにより滞在開始
>
> 平成２４年 ３月３１日 同上卒業




平成20年4月1日 ・・・・インターンシップ（ ・・・・研修） **開始**

平成21年3月31日 同上 **終了**

