Ocean and sea are synonyms. Meaning for most things, that either can be used. However this does not apply to proper names. "Pacific Ocean" should not be called "Pacific Sea", and "Sea of Japan" should not be called "Ocean of Japan".

First notebook entry: Introducing myself

I am learning English, because I want to make friends from word <em>around the</em> <em>world</em>.
My native language is Japanese.

1: What is your learning goal?
To be able to understand the most of what is said on (japanese) TV shows.

2: How much time do you have during the week to study?
Most of it.

3: What is your biggest problem when studying a language?
I have no (zero) money I can spend on learning. I have trouble coming up with stories to remember strange words.

4: Anything else?
I can't seem to find a good list of words that I should learn.