How to say a good idea entered my mind. in Japanese
1)
いいいい(ii) (adj-t,adv-to) easy/simple/plain/good考え考え(kangae) (n) thinking/thought/ideas/intentionがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/and心心(kokoro) (n) mind/heart/spirit/the meaning of a phraseにに(ni) (prt) indicates such things as location of person or thing, location of short-term action, etc.浮no dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbかか(ka) (prt) indicates question/indicates choice, doubt, etc.んだんだ(nda) (exp) the expectation is that .../the reason is that .../the fact is that .../it is that ...。。(。) Japanese period "."
