1 Reply ・ Started by LaungKham000 at 2022-01-10 07:14:09 UTC ・ Last reply by Leebo at 2022-01-10 07:29:50 UTC This is a discussion about 低下 How to use 低下する in a conversation? Help me plz Leebo at 2022-01-10 07:29:50 UTC Why do you ask? There are other expressions that would be more conversational in tone. But to address the issue of how 低下 is used, it's used with regard to drops in quality or degree of something. For instance 質が低下する (the quality drops) or 室温が低下する (the room temperature drops). There are more casual or conversational ways to say those things though, so while they represent the correct use of 低下, they may not be the best option for all conversations. Log in to reply.