Sentence ending particle よ


I would like to ask a question about the sentence ending particle よ and when
it is okay not to use a sentence ending particle in informal japanese. I know
that よ is used when the listener asks you something and you answer or when you
want to correct the listener's opinion but would it be okay to use in other
situations?

For example, if you want to tell your friend that you went to tokyo yesterday
without your friend asking what you did the day before, is it better to say

> 「そういえば、昨日、東京に行った」or 「そういえば、昨日、東京に行った **よ** 」?

Please tell me if there are better options. Thanks in advance!




I think as a general rule you don't often want to use よ when answering a
question unless you think your answer will surprise the person asking the
question.

However, in your example about Tokyo, you are not asking a direct question, so
I think it's better to use よ when you speak about the (surprising) thing you
did. Removing よ from that sounds oddly neutral to me.

よ can drastically change the meaning of certain things. For example, if
someone asks if you for something you can use "いいよ" to agree in the sense of
"sure!". However, saying simply "いい" (or ”けっこう") can actually mean "no
thanks". Of course each of these has a certain tone of voice that goes along
with them.

