How to say this is the key for the box. in Japanese
1)
これはそno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question箱no dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbをを(wo) (prt) indicates direct object of action/indicates subject of causative expression/indicates an area traversed/indicates time over which action takes place/indicates point of departure or separation of action/indicates object of desire, like, hate,あけるあける(akeru) (v1,vt) to open/to unwrap/to unlock/to open/to empty/to clear out/to make space/to make room/to dawn/to grow light/to end鍵鍵(kagi) (n) key/lockですです(desu) (aux) be/is/are。。(。) Japanese period "."
